electronic circuit diagrams Latest, schematics, electronic projects

Field Strength Meter Circuit schematic with explanation

2012-02-01T22:10:00.000-08:00

Here’s a design of the instrument that is very useful for radio frequency (rf) engineer and hobbyist, especially when he/she has to adjust the final rf transmission. Setting up an antenna impedance matcher is one of the examples. This is the figure of the circuit;The circuit uses only one transistor (MPSA18) as the active component. The signal strength meter display uses analog meter (1 mA

Simple Pressure Sensor Circuit schematic

2012-01-31T22:09:00.000-08:00

Here’s a design circuit for a Simple Pressure Sensor Circuit Diagram and the PCB Layout. This sensor is based on the Lucas Nova Sensor NPC-410 Series pressure sensor. This is the figure of the circuit; This circuit design utilizes an LM358 IC. The LM358 consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate

Simple TV Transmitter Circuit Using LM1889n IC

2012-01-30T22:09:00.000-08:00

This is a design circuit for a simple TV Transmitter Circuit Diagram and Circuit Board using LM1889n IC. This is the figure of the circuit; The LM1889n consists of a sound subcarrier oscillator, chroma subcarrier oscillator, quadrature chroma modulators and RF oscillators and modulators for two low-VHF channels.

TL431 based Adjustable Regulator Circuit schematic

2012-01-29T22:07:00.000-08:00

Here’s a circuit for simple Adjustable voltage regulator power supply circuit, at use integrated number circuit TL431. By from the circuit can fine volt 3V – 30V, depend on feed volt supply input and change the value R2, R1. This is the figure of the circuit;It follow a formula calculates Vout = (1+R1/R2), Vref = 3V-30V, but this circuit gives current get not tall 100mA only. It just if

Simple Theremin Circuit Using Inverter Gates

2012-01-29T12:08:00.000-08:00

Here’s a design circuit for simple theremin circuit is constructed using only two inverter chip plus one regulator IC. This Theremin circuit is consists of five functional blocks: power supply regulator, hand controlled oscillator, null oscillator, mixer, and filter. This is the figure of the circuit;The power supply regulator is consists of LP2950 regulator IC, which stabilize the

Capacitive Reactance

2012-01-17T21:52:00.000-08:00

One of the properties of capacitors is its ability to hold a charge when a voltage is applied to it. The buildup of charges inside the capacitor generates a voltage across it and in opposition of the voltage that is driving the incoming charges, effectively resisting to their flow.This effect of resisting current flow into and out of (an apparent flow "through") is called reactance and is

Frequency in the loop: Opamp Active Filters

2012-01-16T21:52:00.000-08:00

When talking about filters in the context of electronics, it means a circuit that will block signals of a certain frequency and allow others to pass; some examples are signal filters to block signals of a certain frequency to be amplified, and source filters that remove an alternating component from a DC power line.Most filters rely on the ability of some components, capacitors and

Basic Passive Filter: a Reactive voltage divider

2012-01-15T21:52:00.000-08:00

Looking back at the voltage divider, it is a circuit where the voltage across the second resistor is proportional to the ratio of the second resistor divided by the total resistance of the divider. Since ohms are used for the calculations, we can replace the second resistor with a capacitive reactance and still get the same results.In a purely resistive voltage divider, when both

A low pass active filter: The Integrator Revisited

2012-01-14T21:51:00.000-08:00

When we first used capacitors as feedback element of an opamp the workings of the circuit was only looked at in terms of direct current, charging the capacitor.With your new knowledge of capacitive reactance, you can see how when the input signal is an alternating current the capacitor and its reactance control the gain of the opamp.With low frequencies, the reactance of the capacitor is

An active high pass filter: The differentiator Revisited

2012-01-13T21:51:00.000-08:00

For the differentiator, an input capacitor was used so as to block constant signals and just output the rate of change. Some examples of calculated derivatives where for constantly changing which resulted in a constant, and the sinusoidal wave which resulted in a cosinusoidal output, which is just a phase shifted sine wave.To understand the differentiator's use as a high pass filter, we

Active Bandpass filters

2012-01-12T21:50:00.000-08:00

When both types of filters are combined into one, that is, a capacitor and resistor in series is used as input and a capacitor and resistor are used in parallel for the feedback, a new type of filter emerges: the bandpass filter.To see how this works, we need to simplify the circuit to use only one element instead of two, in order to make analysis easier. Since when AC is applied to a

Opamp Configurations - Comparator circuit

2012-01-12T09:54:00.000-08:00

One of the main reasons for using opamps as active devices in circuits is that their internal gain is so high, that even if we reduce it to a tiny fraction, it will still be enough for practical purposes. This particular configuration depends on the very high gain of the opamp to swing the output to one of the extremes; the sign of which tells us which input is more positive than the

The Band Stop or Notch Filter

2012-01-11T21:50:00.000-08:00

Another variation of the opamp filter is the band stop or notch filter, called like that because it is as if you cut a notch in the frequencies that pass through the filter, allowing all frequencies outside the notch to pass and blocking the frequencies in that range.Just as the high pass filter is a variation of the low pass filter, changing the reactive element from input to feedback,

Window comparator- Opamp Configurations

2012-01-11T09:54:00.000-08:00

The simple comparator circuit has one inherent problem: it can only tell us if one of the input voltages is higher than the other.But what if you needed a circuit that tells us if a signal is within a range of values? you would need a circuit that tells you if the signal is higher than a minimum and if it also is lower than the maximum. The problem itself hints at the solution.For a

about Logic Equations

2012-01-10T21:49:00.000-08:00

Aside from representing the functioning of a logic gate with a truth table and a grammatical (with words) definition, the use of logic equations can be used not only to represent logic gates and circuits, but also with the usage of some theorems and equivalences, to reduce the number of terms involved, simplifying the equation.In logic equation every boolean variable involved is assigned

Opamp Configurations - Schmitt Trigger

2012-01-10T09:53:00.000-08:00

This opamp configuration is derived from the simple comparator circuit: set up a reference at the non inverting and use the inverting as signal input. There is one main difference: this circuit uses feedback to move the reference point when the signal passes it.The feedback goes from output to the non inverting input via a resistor.This circuit's initial conditions are somewhat random,

Circuit with a switch a basic explanation

2012-01-09T22:40:00.000-08:00

PARTS AND MATERIALS6-volt batteryLow-voltage incandescent lamp (Radio Shack catalog # 272-1130 or equivalent)Long lengths of wire, 22-gauge or largerHousehold light switch (these are readily available at any hardware store) Household light switches are a bargain for students of basic electricity. They are readily available, very inexpensive, and almost impossible to damage with battery

about Minterms and Maxterms

2012-01-09T21:48:00.000-08:00

Truth tables help determine the input combination that will yield a certain output value; This is useful when we want to translate a given truth table into a boolean equation that can be much easily manipulated and simplified before actually building a circuit, hopefully making the wiring eaasier and cheaper by using less components.There are two complementary terms that we use to

Circuit with memory Sequential Logic:

2012-01-08T21:43:00.000-08:00

By using a circuit output as an input to itself so that the next output depends not only on the input signals that are applied at the moment but also on its current state (by feeding back the signal, which was in turn generated by a combination of previous inputs and outputs), we can create circuit that work in steps (sequentially).To accomplish this we first need a subcircuit that will

AO-7, VO-52 & AO-51

2012-01-07T22:36:00.000-08:00

In between cleaning my motor cycles, I have spent today in and out of the shack as I have been closely monitoring the various Satellite passes over my QTH.I started the day early making QSO via the AO-7 Satellite at 08.44 utc with three stations from Europe - 9A2EY, EA1BYC and ON5NY.The next "Bird" I worked via was VO-52, where I made QSO with OZ2SAT & DL7UHF at around 10.32 utc.I then

HO-68 Mode V/U (J) FM Voice Repeater

2012-01-06T22:34:00.000-08:00

I continued chasing the Satellites yesterday and managed to get into HO-68 before I called it a day. I caught the HO-68 pass on video which can be seen below. Enjoy!During this pass HO-68 is operating in FM mode. Contact is made with SW6KRV, UT3NW & ES5QA whilst the Satellite is at a distance of around 750 miles from the Station of 2E0HTS.

Marko- 20M Sked With S57ORG

2012-01-05T22:33:00.000-08:00

Video of QSO between S57ORG and myself at Marko - S57ORG portable location in Slovenia on Sunday 7th NovemberThank You Very Much for this Video Marko, its great to hear myself sounding nice and loud in Slovenia. 73 Hope to catch you again on HF and the Satellite Bands.

The Bands with explanation

2012-01-04T22:33:00.000-08:00

The past couple of mornings have been a bit frosty so I decided on the Car rather than Motor Cycle to get to work which worked out well as I've heard some great signals coming in on 20m from VK - Australia and JA - Japan. The distant DX Stations usually start coming through well up here from now until around late February time. I use the trusty little Toyota 4 X 4 to get through the

NE5534 based 9 Volt Headphone Amplifier circuit

2012-01-03T22:32:00.000-08:00

While doing research for Designing an Opamp headphone amplifier circuits portable, I built a portable headphone amplifier for testing purposes. EACH channel uses a single Burr-Brown Op-Amp NE5534 in a inverting configuration. It has adequate current capability to drive most headphones without an output stage. I have Used it with Sennheiser 465s and achieved ear-splitting volume. The

TDA1516Q Stereo Amplifier Schematic with explanation

2012-01-02T22:30:00.000-08:00

This following is a simple stereo amplifier circuit, with minimal external components. It use only one opamp. TDA1516Q, that is capable to give output power 2 x 5Watt in the 4 ohms, with 0.5% distortion. The capacitor C5, it Should in pins placed near the IC TDA1516Q.The amplifier circuit can be used to drive small personal computer speakers. They are widely used in automotive sound

TDA2002 Amplifier Schematic Circuit with explanation

2012-01-01T22:29:00.000-08:00

This is a power amplifier circuit which built using a TDA2002 power amplifier IC module. These are replacements for the original LM383 which is no longer available. It is easy to build and has a minimum of external components. The module has both short circuit protection and thermal protection. It can drive loads as low as 1.6 ohm and is capable of delivering over 10 watts from a 16 V

TDA 2011 BTL Stereo Amplifier schematic with explanation

2011-12-31T22:26:00.000-08:00

This present here is a 20Watts mono and 10Watt Car Stereo Amplifier circuit using IC TDA2011.Rangkaian TDA 2011 BTL|Stereo AmplifierThe TDA2011 is a class B dual audio power amplifier in MULTIWATT [package Designed specifically for car radio applications. TDA2011 has low noise, low distortion, and robust. The robustness is supported by its operation safety protection features: very inductive

Stepper Motor Stepping Modes circuits

2011-12-26T20:56:00.000-08:00

Stepper Motor Stepping Modes Stepper Motor Connections:Unipolar motor should have five or six connections depending on the model. If the motor has six connections like the one pictured above, you have to join pins 1 and 2 (red) together and connect them to a (+) 12-24V voltage supply. The remaining pins; a1 (yellow), b1 (black), a2 (orange), b2 (brown) should be connected to a driver (

Unipolar Stepper Motor Drivers

2011-12-24T20:55:00.000-08:00

Unipolar Stepper Motor Drivers There are actually many ways you can interface a stepper motor to your controller, out of them the most used interfaces are:Interface using L293D - H-Bridge Motor DriveInterface using ULN2003/2004 - Darlington ArraysULN2003/2003 Driver:The below circuit is of unipolar stepper motor driver using uln2003. The "Controller pin 1",2,3 and 4 will control the

Water Level Controller and motor Protector v2

2011-12-23T20:52:00.000-08:00

This is the v2 by using PIC16F877A with minimum components. The most left circuitry is the same as in mains monitor; used to check to variation in ac voltage (operating range is between 200v ac - 240v ac). Five pull-up resistor circuitry is used to measure the water level in the desired water tank. Note that the push buttons are used here is only for illustration purpose, basically

Stepper Motor Programming circuit schematc

2011-12-22T20:53:00.000-08:00

Full Step Sequence: I am using PIC16F628A with uln2003 to drive unipolar stepper motor. Adjusting the delay will increase or decrease the speed of the motor. Here just for demonstration i have taken some delay, you can change it as you want. If you want to change the direction of stepper motor, just reverse the step sequence (means 9,3,6, and C etc). Code: void delay();void main(){

PIC16F628A based Electronic Combination Lock circuit schematic

2011-12-21T20:42:00.000-08:00

PIC16F628A based Electronic Combination Lock circuit schematic This electronic combination lock can be use with an outdoor gate. The functionality is implemented in software. It turns on a relay (usually to open a door) for a few seconds if someone enters the valid code. The relay can operate a power to open type electric strike with a shorting contact or a power-to-hold type

300-Watt Audio Amplifier MJ15003 -MJ15004 300-Watt Audio Amplifier MJ15003 -MJ15004

2011-12-21T01:52:00.000-08:00

300-Watt Audio Amplifier MJ15003 -MJ15004 300-Watt Audio Amplifier MJ15003 -MJ15004When I began the design of this amp, my goal was to make a product better suited for the reproduction of complex music and voice. Although I emphasize the high electrical properties, the most important requirement is to create a superior sound, vivid images and superb spatial aural clarity.Although the

Audio Amplifier 4 Transistor Audio Amplifier 4 Transistor The circuit a 4-transistor amplifier suitable for a variety of projects including receivers

2011-12-20T01:50:00.000-08:00

Audio Amplifier 4 Transistor Audio Amplifier 4 TransistorThe circuit a 4-transistor amplifier suitable for a variety of projects including receivers, intercoms, microphones, telephone pick-up coils, and general audio monitoring. The amplifier has a power isolation circuit and bandwidth limiting to reduce oscillations and “motorboating”. The values are not particularly critical and

KA2209 Stereo Mini Audio Amplifier Circuit This is 2x1W mini audio amplifier circuit using IC KA2209. It will operate well from 3-12V DC and will work

2011-12-19T01:49:00.000-08:00

KA2209 Stereo Mini Audio Amplifier Circuit This is 2x1W mini audio amplifier circuit using IC KA2209. It will operate well from 3-12V DC and will work from a battery since the quiescent current drain is low. It requires no heat sink for normal use. The input and output are both ground referenced. Maximum output will be obtained with a 12V power supply and 8 ohm speaker, however it is

TDA 7053 Stereo Audio Amplifier Circuit Rangkaian 1W Amplifier TDA 7053

2011-12-18T00:24:00.000-08:00

TDA 7053 Stereo Audio Amplifier Circuit Rangkaian 1W Amplifier TDA 7053This is a 1 watt stereo audio amplifier circuit using IC TDA 7053 from Philips. It is particularly suited to battery operation, providing 1 watt per channel from only a 6V DC supply. It will operate best from 6 – 12 V DC and requires no heat-sink for normal use.Rangkaian TDA 7053 Stereo Audio AmplifierThe TDA7053

TK4036II - 50W Stereo Power Amplifier Circuit schematic Rangkaian Amplifier TK4036II

2011-12-17T00:22:00.000-08:00

TK4036II - 50W Stereo Power Amplifier Circuit Rangkaian Amplifier TK4036II This is a 50 Watt Audio power amplifier circuit based single IC STK4036II. Use heatsink to prevent overheating on the IC. The amplifier circuit will give you good quality of sound unexpensive and have low price. It is easy we make a power amplifier using only few external components. The STK4036II amplifier

TDA1013B - 4W Audio Amplifier Circuit schematic with explanation

2011-12-16T00:21:00.000-08:00

TDA1013B - 4W Audio Amplifier Circuit The following a circuit of 4 watt audio amplifier. The amplifier is using on integrated audio amplifier chip, TDA1013B which is able to gained the audio power output up to 4W at 8 ohm loads. The wide supply voltage range makes this amplifier circuit ideal for applications in mains and battery-fed apparatus such as television receivers and record

STA550 - 2 x 70W Audio Amplifier Circuit schematic

2011-12-15T06:19:00.000-08:00

STA550 - 2 x 70W Audio Amplifier Circuit This is a 2 x 70W audio power amplifier circuit which built using single IC STA550. The amplifier circuit require few external components (most of them are resistors and capacitors) and is very easy to design The STA550 audio amplifier is capable to provide a maximum output power of 70 watts on two channels (70 + 70 watts).STA550 - 2 x

DA1553CQ - Car Audio Amplifier 2 x 22 Watt Circuit

2011-12-14T00:19:00.001-08:00

DA1553CQ - Car Audio Amplifier 2 x 22 Watt Circuit This is a 22 Watt car stereo audio amplifier. The circuit is based by a single IC TDA1553 with some external components, this IC will handle your stereo car audio system. The IC TDA1553CQ contains 2×22 W amplifiers with differential input stages and can be used for bridge applications.. The gain of each amplifier is fixed at 26 dB.

555 İnfrared Firely Beacon Circuit Schematic With explanation

2011-12-10T22:13:00.000-08:00

source: electropage.com

Event Failure Alarm using 555 circuit schematic with explanation

2011-12-09T22:06:00.000-08:00

source: www.elektropage.com

555 Basic Monostable Circuit Schematic With explanation

2011-12-08T22:03:00.000-08:00

A negative trigger pulse at Pin 2 turns off a transistor that otherwise shorts C1 to ground, the output then goes high as C1 charges through R1. When the Vharge on C1 is 2/3 Vcc the 555 Discharges C1 to Ground. The output then goes lowelecktropage.com

LM555 Led Flasher Schematic Circuit With explanation

2011-12-07T21:53:00.000-08:00

source: electropage.com

555 Light Dark Dedector Circuit Schematic With explanation

2011-12-06T21:49:00.000-08:00

Source: elektropage.com

555 Toy Organ Circuit Schematic With explanation

2011-12-05T21:48:00.000-08:00

elektropage.com

555 Variable Frequency Pulse Generator Circuit Schematic

2011-12-04T21:45:00.000-08:00

555 Astable Circuit circuit schematic with explanation

2011-12-03T21:39:00.000-08:00

When the 555 IC is used to produce an ASTABLE circuit - it will continually pulse until power is removed. Astable circuits can be used to flash lights/LEDs on and off or to turn a buzzer on and off repeatedly. They are also used in many more school based circuits.Look at the circuit drawn below. Pins 6 and 2 are connected and go to the negative (0 volts). This is the easiest way of

Ultrasonic Parking Sonar circuit schematic with explanation

2011-11-28T22:45:00.001-08:00

.fullpost { display: inline; } This circuit electronic is an ultrasonic parking sonar. Based on an ultrasonic amplifier from an article seen on a 1982 magazine, it was once installed on the rear bumper of my Volvo Station Wagon. It served very well for many years. Connecting it to the reverse gear lights, it switches on automatically and shows you the distance to the nearest obstacle (

PIC Countdown Timer circuit schematic with explanation

2011-11-26T22:34:00.000-08:00

The purpose of this timer is to provide a countdown time from 1 second to 99 minutes & 59 seconds. I use it to control the lighting for the Ultra-Violet exposure of photosensitive PCB material. The project provides also an audible alarm at the end of the countdown time and switches the UV lights by means of a relay. It is based on a Microchip microcontroller, the 18 pin PIC16F84(A). This

Water Level Indicator Electronic Circuit Diagram

2011-11-25T22:06:00.000-08:00

Description: The following circuit shows about Water Level Indicator Electronic Circuit Diagram. Features: Battery operation to avoid problems related to mains supply and water proximity, No separate supply for the remote circuit, simple LED display for the main unit. Component: Battery, Transistor, Switch, Capacitor, Resistor.[tpub.com]

USB Audio D/A Converter circuit schematic with explanation

2011-11-24T22:31:00.000-08:00

.fullpost { display: inline; } This electronic circuit is an high quality preamplifier with built-in DAC from SPDIF or USB for my power amplifier Leachamp. I had available circuit PCM2902. I tried to design DAC from USB with this circuit on one-sided PCB and I was succesful.Schematics is from datasheet of PCM2902. Circuit includes DAC and ADC, SPDIF output and input and HID part with

BC550 Transistor For Three Channel Audio Mixer Circuit

2011-11-24T22:05:00.000-08:00

Description: The following circuit shows about BC550 Transistor For Three Channel Audio Mixer Circuit. Features: featuring three inputs, providing high overload margins and low-noise figures, required a much simpler device, Low current consumption due to a simple, proportional to gain-level settings, . Component: Transistor, Battery, Capacitor, Switch, Resistor.[circuit.presstoday.net]

A Tiny pH-Meter circuit schematic with explanation

2011-11-23T22:28:00.000-08:00

.fullpost { display: inline; } This electronic circuit is a tiny pH-meter. It is very tiny: 11cm2 including the PSU circuit! The schematic is shown below. It is basically a simple gain/offset circuit with a high impedance input (several giga-Ohm) and frankly the explanation could stop here: anyone with an background in electronics can understand this. But I started to write a webpage

Electronic Circuit Diagram For Digital Step-Km Counter

2011-11-23T22:03:00.000-08:00

Description: The following circuit shows about BC550 Transistor For Three Channel Audio Mixer Circuit. Features: measures the distance covered during a walk, For low battery consumption. Component: Transistor, IC, Battery, Capacitor, Switch, Resistor.[circuit-finder.com]

AC Ohmmeter - ESR Meter circuit schematic with explanation

2011-11-22T22:26:00.000-08:00

.fullpost { display: inline; } The ESR Meter is basically an AC Ohmmeter with special scales and protective circuitry. It provides a continuous reading of series resistance in electrolytic capacitors. It operates at 100 kHz to keep the capacitive reactance factor near zero. The remaining series resistance is due to the electrolyte between the capacitor plates and indicates the state

LM2005 based 20 Watt Automotive Power Amplifier circuit schematic with explanation

2011-11-21T22:23:00.000-08:00

.fullpost { display: inline; } The high current capability of the LM2005 allows it to continuously endure either AC or DC short circuit of the output with a maximum supply voltage of 16V. This will protect the loudspeaker in a bridge mode, when a DC short of the output occurs on one side of the speaker.The device will prevent the speaker from destruction by reducing the DC across the

LM1875 based Monolithic Audio Amplifier circuit schematic datasheet

2011-11-21T19:35:00.000-08:00

Monolithic Audio Amplifier LM1875 .fullpost { display: inline; } The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications.Download Monolithic Power Amplifier LM1875 Datasheet

LM903 Fluid Level Detector circuit schematic with explanation

2011-11-20T22:22:00.000-08:00

.fullpost { display: inline; } All supervisory requirements to control the thermal-resistive probe, including short and open circuit probe detection, are incorporated within the device. The circuit has possible applications in the detection of hydraulic fluid, oil level, etc., and may be used with partially conducting fluids.Download LM903 Fluid Level Detector Datasheet.

Audio Power Amplifier LM386 datasheet

2011-11-20T19:34:00.000-08:00

Audio Power Amplifier LM386 .fullpost { display: inline; } The LM386 is a power amplifier designed for use in low voltage consumer applications.Download LM386 Low Voltage Power Amplifier Datasheet

Net-Enabled Alarm Clock circuit schematic with explanation

2011-11-19T22:30:00.001-08:00

.fullpost { display: inline; } Unlike old-school mechanical alarm clocks that you have to set manually, DJ’s Internet-connected alarm clock provides three primary features: automatic time setting on power-up, streaming MP3 music, and remote management. The PIC24FJ64-based clock is connected to an ENC28J60 Ethernet chip, an MP3 decoder chip, an organic LED graphical display, and a 24LC512

Water Level Indicator circuit schematic with explanation

2011-11-19T22:25:00.000-08:00

.fullpost { display: inline; } This electronic circuit is a water level Indicator. It is simple and practical measure and know the level of reservoir. The component IC CMOS 4066 used as switcher on any level detector/sensor that connect the negative polarity pin of each LED to ground. Buzzer will be sounded if full level sensor achieved. It's a cool electronic circuit.Features:Power

TDA1524A based Stereo Tone - Volume Control Circuit schematic with explanation

2011-11-19T22:21:00.000-08:00

.fullpost { display: inline; } The device is designed as an active stereo-tone/volume control for car radios, TV receivers and mains-fed equipment. It includes functions for bass and treble control, volume control with built-in contour (can be switched off) and balance. All these functions can be controlled by d.c. voltages or by single linear potentiometers.Download Stereo-Tone - Volume

GT4123 & GT4123A Video Mixer ICs

2011-11-19T22:20:00.000-08:00

.fullpost { display: inline; } The GT4123 and GT4123A are two input video mixer ICs available to the professional video and multimedia markets. Each input signal is applied to a conventional differential amplifier (AMP A and AMP B). From the amplifiers, the signals are applied to analog multiplier circuits (XA and XB) whose outputs are the product of the input signals and internally

TDA7053 2 x 1 W Portable-/Mains-Fed Stereo Power Amplifier

2011-11-19T19:31:00.000-08:00

2 x 1 W Portable-/Mains-Fed Stereo Power Amplifier TDA7053 .fullpost { display: inline; } The TDA7053 is an integrated class-B stereo power amplifier in a 16-lead dual-in-line (DIL) plastic package. The device,consisting of two BTL amplifiers, is primarily developed for portable audio applications but may also be used in mains-fed applications.Download Datasheet 2 x 1 W Portable-/

Audio Test Equipment - Pink Noise Generator

2011-11-18T19:29:00.000-08:00

Audio Test Equipment - Pink Noise Generator .fullpost { display: inline; } This audio test equipment is for audio testing, a pink noise source is an invaluable tool. It is essentially a flat frequency response noise source, and will quickly show any anomolies in speaker systems, room acoustics and crossover networks.White noise (the sound you hear when a TV is tuned to a non-existent

Milligauss Meter Circuit schematic with expanation

2011-11-17T19:27:00.000-08:00

Milligauss Meter Circuit schematic with expanation .fullpost { display: inline; } The circuit provides an easy yet reliable way to detect the intensity of a.c. (or e.l.f.) fields around the home or workplace. It is doubly effective because it does not merely detect the electromagnetic radiation emitted by electrical appliances, but the electromagnetic energy actually absorbed by the

UTP Cable Tester 2 circuit schematic with expalanation

2011-11-16T19:25:00.000-08:00

UTP Cable Tester 2 circuit schematic with expalanation .fullpost { display: inline; } The UTP Cable Tester can be used for many purposes. Mainly to test a UTP network cables of course. However it can also be used to find the right cable in a large bundle of identical looking cables. In fact the circuit can be used or adapted to test any type of cable of any number of wires, provided that

A Simple UTP Cable Tester with circuit and full explanation

2011-11-15T19:22:00.000-08:00

.fullpost { display: inline; } The circuit below is designed so that when the ends of a UTP cable are plugged into each of the "RJ45 Sockets", the circuit for each pair is completed and the LEDs light up. If there is a break in a wire (or the leads are incorrectly terminated) the corresponding LED will not light. For remote testing (where you can't get at both ends) cut the board apart

Resistor Calculator for LEDs (serial and parallel) V.2 Software that calculates the resistor value and its power consumption in different LED's circu

2011-11-07T09:02:00.000-08:00

Resistor Calculator for LEDs (serial and parallel) V.2 .fullpost { display: inline; } Software that calculates the resistor value and its power consumption in different LED's circuit configurations (simple, series o parallel) according to the source voltage, the LED's voltage and the wanted current value. All are shown in the same screen in order to make direct comparisons on

ADC AND I/O CAN BUS Circuit schematic with explanation

2011-11-06T21:01:00.000-08:00

ADC AND I/O CAN BUS Circuit MCP2502X/5XDescriptionThe MCP2502X/5X devices operate as I/O expandersfor a Controller Area Network (CAN) system,supporting CAN V2.0B active, with bus rates up to1 Mb/s. The MCP2502X/5X allows a simple CAN nodeto be implemented without the need for amicrocontroller.The MCP2502X/5X devices feature a number ofperipherals, including

CAN BUS Interface With Microcontroller by SPI Circuit

2011-11-05T21:00:00.000-07:00

CAN BUS Interface With Microcontroller by SPI Circuit SYSTEM IMPLEMENTATIONMCP2515DescriptionMicrochip Technology’s MCP2515 is a stand-aloneController Area Network (CAN) controller that implementsthe CAN specification, version 2.0B. It is capableof transmitting and receiving both standard andextended data and remote frames. The MCP2515 hastwo acceptance

High-Speed Leakage Circuit Breaker Circuit schemamatic

2011-11-04T20:58:00.000-07:00

High-Speed Leakage Circuit Breaker Circuit The value of R1, R2, C4, and C5 should be chosen in order to keep at least 12V in Vs.Please connect C4 (>1μF) and C2 (<1μF).ZCT and load resistance RL of ZCT are connected between input pin 1 and 2.Protective resistance (RP=100Ω) must be insurted.RL and amplifier’s output (in Pin 4) regulates sensitivity

Wireless Dimmer Circuit Project with explanation

2011-11-03T20:56:00.000-07:00

AVR wireless dimmer ProjectAt first we have to modify the layout of the old Avr dimmer. I don't think the RS232 interface will be used much when we have the wireless option available, so all the parts for the RS232 will have to go, the other thing that we don't really need anymore is the crystal with the 2 capacitors, because the ATtiny2313 has a build in RC clock of 4 and 8 Mhz which is

MAGNETIC LEVITATION Project & CRITICAL TEMPERATURE KIT

2011-11-02T20:54:00.000-07:00

MAGNETIC LEVITATION Project & CRITICAL TEMPERATURE KITELECTRONICS CIRCUIT SCHEMATIC DIAGRAMSThe following figure is a schematic diagram for the Electronics Board.Operation of the Electronics Board circuitry may be of interest to some students who use the Levitation/Critical Temperature kit. Individual circuit functions may be understood and analyzed from the following explanations. Operational

Automatic Sequential Video Switcher Kit

2011-10-28T01:42:00.000-07:00

Now you can monitor up to four video cameras or other video sources on one video monitor. The AVS10C will automatically sequentially switch between inputs one through 4, and display the output on a video monitor. Perfect for multiple video camera installations, stores, household surveillance systems, and more. Has (4) RCA inputs for video input, and one RCA output connector, so you can use

CMOS CW Keyer Kit

2011-10-27T01:40:00.000-07:00

Add to your CW fun with our low cost CMOS Keyer Kit. You send clean code thats a pleasure to copy; self completing dots and dashes with properly weighted spacing and timing are all programmed into the CW7s design. Assembly of the keyer is fast, easy, and fun. Our step-by-step instructions lead you to a finished unit in only one evening. For beginners the CW7 makes an ideal code practice

Assembled Wireless Cable Tracer

2011-10-26T01:39:00.000-07:00

Did you ever have to identify the other end of that cable? Well up to now you had to ohm it out, cable by cable. Now with the Cable Wizard you can quickly identify that cable without even touching the other end! Simply connect the Wizard to the end of the cable you’re working with. Then use the Wizard receiver to sniff out the other end of the cable, whether it’s close to you…or across an

20 Meter QRP Amateur Radio Receiver Kit

2011-10-25T01:38:00.000-07:00

These little rigs are burning up the airwaves as young and old alike are rediscovering the fun in building their own equipment! Our detailed, step-by-step instruction manuals make building an enjoyable and rewarding experience. You’re guided carefully to the completion of a unit that not only works, but will provide hours of operating pleasure. These trusty and proven Ramsey all mode mini

400mW fm bug transmitter circuit

2011-10-24T04:50:00.000-07:00

Power supply: 12-14 V stab., 100 mA. RF power: 400 mW. Impedance: 50-75 ohm. Frequency range: 87,5-108 MHz. Modulation: wideband FM. Connect the 6 V / 0,1 A bulb to the output and use R1 to tune the right frequency. Maybe you might stretch coils of the L1. Then use C14 and C15 to adjust the highest power (the highest light of the bulb). Then you can connect antenna and audio signal. Adjust

Automatic Infrared IR Thermometer

2011-10-24T01:36:00.000-07:00

This beauty is one of the neatest thermometers we’ve ever seen! You can measure the temperature of anything merely by pointing a IR beam of light at it! That’s right, no contact, no sensors, no wires, glass, nothing but a beam of IR light! Is your motor running hot? Is your refrigerator cold enough? How cold IS that bottle of soda? If you want to know, just aim and push the button. The

14 watts audio amplifier with lm301 and tip2955-tip3055 circuit schematic with explanation

2011-10-23T01:40:00.000-07:00

The following circuit is a Audio amplifier which can give 14 watts of power. Feature : provide 14 watts of power, a discrete power op-amp, gain of approximately 150, preamp has voltage gain of 10, has extremely low distortion, relatively insensitive to the choice of components. Component : Capacitor, Resistor, potentiometer, CA3140, LM301, 1N751 Zener diodes, Speaker, 2N3904 transistor,

IC 4049 Square wave oscillator generator circuit schematic with explanation

2011-10-21T12:10:00.000-07:00

We can bring the inverter CMOS digital IC, to design the Square wave oscillator generator circuit diagram, to a lot circuit been simplified.The circuit we use less, just add a resistor and capacitor are the only one,It uses less energy. The output frequency is relatively constant, the rate of change in frequency of the power supply voltage is less.The ICs in the circuit number CD4069. The

Wireless Bug detector circuit schematic with explanation

2011-10-19T06:48:00.000-07:00

This fairly simple circuit makes it possible to place such a wall as a conduit to locate. It is a conduit for power, no water or gas-seeker. The only requirement is that there is tension on the line. The antenna in the table can consist of a simple piece of copper wire. The correct adjustment is done through R7, in order to prevent the buzzer and LEDs still light up even though there is no

Temperature Sensor Module Kit

2011-10-19T06:46:00.001-07:00

Looking for a general purpose, easy to interface temperature sensor for your projects? This is it! Whether you need to control heating and cooling of rooms or equipment, monitor temperatures in circuits, monitor your pool temperature, or simply put a temperature readout on your website, the K8067 fits the bill. With an accuracy of 2° over the full range! The small board makes integration

Temperature Sensor Module Kit

2011-10-19T06:46:00.000-07:00

Video Camera switcher based on MAX454 circuit schematics

2011-10-15T17:15:00.000-07:00

The video switcher described here can display the output of two, three, or four cameras on a single monitor. The number of cameras is set by a DIP switch on the circuit board. That feature avoids blank displays if less than four cameras are used by sequencing through only the inputs that are connected to a camera. In the automatic mode, the cameras are switched at a rate that can be varied

Simple function generator using LM1458 circuit schematic with explanation

2011-10-14T07:28:00.002-07:00

As usual the function generator will be expensive and difficult.However, this is a simple circuit with only two ICs.This circuit is suitable for experiments. The output is 3 waveform , Square wave signal amplitude 7Vp-p, Triangular wave = 2Vp-vp and sine wave = 2Vp-p all have the frequency 1kHz.We use 2 x LM1458 IC number, is the main equipment this a dual op-amp IC. This circuit uses op-amp

Laser Temp Gun HVAC Kit

2011-10-14T07:28:00.001-07:00

Measure temperature safely and accurately with the Milwaukee 2277-21 12V Laser Temp-Gun Thermometer Kit with Humidity and Dew Point. Ideal for electricians, HVAC/R technicians, general contractors, construction workers, and plumbing professionals, this kit contains the easy-to-use 2277-20 thermometer, a Milwaukee Test & Measure tool that identifies hot spots, prevents damage to electrical

Bar graph light meter based on ic 741 circuit schematic with explanation

2011-10-14T07:24:00.000-07:00

If you want simple meter the intensity of the light in a simple way. This circuit is very interesting, because with a LED display with 5 levels.The main equipment is uA741 the most popular op-amp circuit, to used the photo transistor is a device for receiver a lighting to change is electricity very low. We use IC1 acts boost up current, or to compare the voltage levels.The VR1 adjusts the

High pass active filter based on LM741 circuit schematic

2011-10-12T20:06:00.000-07:00

The high pass filter circuit is a high frequency filter, only through it. In this circuit we are use operational amplifiers IC 741 number, it is allows this circuit has a lot performance,and has cut off frequency precise. Despite the possibility of multi-circuit filter,With different levels of growth and differentiation of a roll back in the op-amp IC. But this circuit can reduce the

Audible-light-sensor-by-ic-741 circuit schematic

2011-10-12T20:02:00.002-07:00

This is audible light sensor circuit that is based the IC741 op-amp IC. This circuit light sensor one,these are use two LDRs for detector lower lightly.The 741 is pulse oscillator generator output to small speaker. The VR1 have value 50k acts as to fine sensitivity of light sensor. The speaker use small size only because output has low current.Source: eleccircuit.com

LEDS8 High Power LED Strobe Board circuit schematics

2011-10-12T20:02:00.001-07:00

LEDS8 is an accessory display board for our LEDS1 High Power LED Strobe Light. It provide a strip array of 8 high power LEDS that plug in to the LEDS1. Thin stripline design is perfect for custom built-in applications.Read more

Programmable Code Lock schematic circuit with explanation

2011-10-11T21:29:00.000-07:00

A programmable code lock can be used for numerous applications in which access to an article/gadget is to be restricted to a limited number of persons. Here is yet another circuit of a code lock employing mainly the CMOS ICs and thumbwheel switches (TWS) besides a few other components. It is rugged and capable of operation on voltages ranging between 6 and 15 volts. The supply current drain

Switch ON-OFF touch or with push button circuit schematic

2011-10-11T21:18:00.000-07:00

Here we have three choices, with which we can make electronic switches that use our touch or pressing (push button). We thus exploit the very big resistance of entry, that present the gates CMOS. In the fig.1 we have two gates NAND or NOR (IC1), connected as R-S flip-flop. Just as we press the switch S1, the exit 3 it becomes [H], even it is maintained in this

Dual Input Single 3.3V/4A Output Step Down Converter Circuit Diagram using LT3692

2011-09-29T21:44:00.000-07:00

Below circuit appears Dual Input Single 3.3V/4A Output Step Down Converter using LT3692 monolithic dual tracking step down regulator. This LT3692 used to be applied in automotive supplies and distributed supply regulation.3.3V_4A step down converterAccording to the datasheet, LT3692 is a dual current mode PWM step-down DC/DC converter with two internal 3.8A switches. Independent input voltage,

Remote Unit Receiver Circuit Schematic using TDA7000

2011-09-29T21:42:00.000-07:00

This circuit schematic below shows Remote Unit Receiver with TDA7000 for narrowband FM reception. Accordingly, there will be a very attractive handset as narrow band receiver with TDA7000 in it.fm radio receiver schematicThis remote unit receiver (handset) contains mixer, oscillator, IF amplifiers, a demodulator, and squelch functions. TDA 7000 will mix the incoming signal to such a low IF

LM139 Comparators Circuit Schematic Diagram and Datasheet

2011-09-29T21:36:00.000-07:00

This schematic diagram below shows you with LM139 series low power low offset voltage quad comparators. Including to the LM139 series, there are such LM239/LM339/LM2901/LM3302 which were designed specifically to operate from a single power supply over a wide range of voltages.lm139 comparator circuitThis LM139 device has advantages such as power drain suitable for battery operation, eliminates

Infrared Detector circuit schematic

2011-09-24T07:23:00.001-07:00

Note: The text is AUTO translated from Greek version The infra red radiation is a region with bigger length of wave from the visible spectrum. It is a region which our eye does not conceive, the consequences however which we felt as heat of. The manufacture that to you we propose receives this region and on one side us notice with

Telephone Record Control circuit schematics with explanation

2011-09-23T07:00:00.000-07:00

This circuit will allow you to connect any tape recorder that has a mic and remote input to a phone line and automatically record both sides of a conversation when ever the phone is in use. You will need to take a couple of voltage readings before connecting the circuit. First determine the polarity of your phone line and connect it to the circuit as shown and then determine the polarity of