1 Watt RF Signal Amplifer Class C with Transistor

1Watt RF signal amplifer circuit

Regarding the circuit is a universal 1 W. RF signal class C amplifier which is ideally suited for reduce to low power FM transmitters.

The Input much be least at 100mW for achieve 1Watt output. This is recommended to enclose the amplifier in a metal case.

Part List

Freq.	P Out	C1	C2	C3	L1	L2	RFC	Q1
30MHz	30dBm	150 pf	15 pf	39 pf	1.5 uh	1.2 uh	33 uh	2N5109
100 MHz	24 dBm	68 pf	10 pf	none	0.82 uh	0.47 uh	10 uh	2N5109
200 MHz	30 dBm	33 pf	10 pf	none	0.47 uh	0.27 uh	5.6 uh	MRF227

Q1 Transistor: 2N5109, MRF227, 2N4427, 2N3866
Voltage Supply: 12 – 15V

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Setpoint Control for Temperature Controller AD596/597

This is a setpoint controller circuit using The AD596/AD597. The thermocouple voltage is amplified, compared to an external setpoint voltage, and cold junction compensated. The device temperature can be monitored if the temperature to be controlled is within the operating range (–55°C to +125°C) of the device. Here is the schematic diagram of the circuit: …[Read More]

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Step Down DC-to-DC Converter ADP1821

This is a ADP1821 Step Down DC-to-DC Converter circuit. This circuit uses ADP1821 that is synchronous pulse-width-modulated (PWM), step-down controller, inexpensive and versatile. It can drive all N-channel power stage to regulate an output voltage as low as 0.6 V. The output voltages that can be provided by this circuit is from 0.6 V to …[Read More]

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12VDC to 220VAC (500 Watt Power Inverter )

This power inverter takes 12 VDC and steps it up to 220 VAC. It can be used to run a TV, stereo or other appliance while on the road or camping. In this circuit 4047 is use to generate the square wave of 50 Hz and amplify the current and then amplify the voltage by using the step transformer.

Attention: This Circuit is using high voltage that is lethal. Please take appropriate precautions

How to Calculate Transformer Rating
The basic formula is P=VI and between input output of the transformer we have

Power input = Power output

For example:
If we want a 220W output at 220V then we need 1A at the output.
Then at the input we must have at least 18.3A at 12V because:

12V x 18.33 = 220v x 1

So you have to wind the step up transformer 12v to 220v but input winding must be capable to bear 20A.

Author: Ashad Mustufa
e-mail: mustufa66@hotmail.com
web site: http://www.electronics-lab.com

See more: Voltage Power Adapter for Car Power Supply

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Power Inverter 1000 Watt by Mosfet

This power inverter circuit will provide a very stable “Square Wave” Output Voltage. Frequency of operation is determined by a pot and is normally set to 60 Hz. Various “off the shelf” transformers can be used. Or Custom wind your own for best results.

Additional MosFets can be paralleled for higher power. It is recommended to Have a “Fuse” in thePower Line and to always have a “Load connected”, while power is being applied. The Fuse should be rated at 32 volts and should be aproximately 10 Amps per 100 watts of output.

The Power leads must be heavy enough wire to handle this High Current Draw! appropriate Heat Sinks Should be used on the RFP50N06 Fets. These Fets are rated at 50 Amps and 60 Volts. Other types ofMosfets can be substituted if you wish.

Note
There ARE Limitations! I have had numerous requests for an Inverter for 1000 watts and Even MORE. Sorry I Don’t feel this is Practical. At 1000 Watts and operating from a 12 Volt Source, the Input Current will be close to 100 AMPS. That would Require a HUGH Size of a Primary Wire. Source: A Mos-Fet Power Inverter

Check out this Voltage Power Adapter for Car Power Supply

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1000 Watt Mosfet Power Inverter

This power inverter circuit will provide a very stable “Square Wave” Output Voltage. Frequency of operation is determined by a pot and is normally set to 60 Hz. Various “off the shelf” transformers can be used. Or Custom wind your own for best results.

Additional MosFets can be paralleled for higher power. It is recommended to Have a “Fuse” in the Power Line and to always have a “Load connected”, while power is being applied. The Fuse should be rated at 32 volts and should be aproximately 10 Amps per 100 watts of output. The Power leads must be heavy enough wire to handle this High Current Draw! appropriate Heat Sinks Should be used on the RFP50N06 Fets. These Fets are rated at 50 Amps and 60 Volts. Other types of Mosfets can be substituted if you wish.

There ARE Limitations! I have had numerous requests for an Inverter for 1000 watts and Even MORE. Sorry I Don’t feel this is Practical. At 1000 Watts and operating from a 12 Volt Source, the Input Current will be close to 100 AMPS. That would Require a HUGH Size of a Primary Wire.

1000 Watt Mosfet Power Inverter

Read more at: http://skemarangkaian.com/1000-watt-mosfet-power-inverter/

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Bass Booster Stereo Preamplifier Circuit and explanation

Bass Booster Stereo Preamplifier Circuit Parts:

P1_________________10K Log.Potentiometer (Dual-gang for stereo)
P2________________100K Log.Potentiometer (Dual-gang for stereo) (See Notes)

R1,R2_____________100K 1/4W Resistors
R3,R6______________15K 1/4W Resistors
R4_________________10K 1/4W Resistor
R5_________________22K 1/4W Resistor
R7__________________1K 1/4W Resistor
R8________________560R 1/4W Resistor

C1,C2,C5____________2µ2 63V Electrolytic Capacitors
C3________________470µF 35V Electrolytic Capacitor
C4__________________1µF 63V Polyester Capacitor
C6_________________47nF 63V Polyester Capacitor
C7_________________22µF 25V Electrolytic Capacitor

IC1_______________TL072 Dual BIFET Op-Amp

SW1________________DPST Switch (Optional, see Notes)

This preamplifier was designed to cope with CD players, tuners, tape recorders etc., providing an ac voltage gain of 4, in order to drive less sensitive power amplifiers. As modern Hi-Fi home equipment is frequently fitted with small loudspeaker cabinets, the bass frequency range is rather sacrificed. This circuit features also a bass-boost, in order to overcome this problem. You can use a variable resistor to set the bass-boost from 0 to a maximum of +16dB @ 30Hz. If a fixed, maximum boost value is needed, the variable resistor can be omitted and substituted by a switch.

via:http://skemarangkaian.com/bass-booster-stereo-preamplifier-circuit/

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