Here the stereo power amplifier based on single IC STK4141II. This stereo amplifier circuit will deliver 25W audio power on each output channel. Recommended voltage is 27.5V for 8 ohms speaker and 24.5V for 4 ohms speaker while the maximum voltage to supply this circuit should be about 41 VDC. This circuit operated with dual… Read More »
Here is the 2 x 100W stereo power amplifier with STK4231II as the main amplifier component. This is a high power audio amplifier with dual output channel at 100W max for each channel. I think it is a very good amplifier because it has capability to deliver high stereo output power with only use a single… Read More »
Here is the simple 2 x 30W audio amplifier with STK-465 power IC. Simple circuit with higher power output, this amplifier circuit is very easy to build. Just look at the PCB layout of this circuit.. 🙂 . The active component required is just the main power amplifier chip STK-465. Schematic diagram: This is a… Read More »
This is the circuit diagram of 50W power amplifier based on audio power amplifier IC STK-1050. Symmetrical power supply used to operate this circuit with maximum voltage rated at 53V and recommended supply is 36V. This is a single channel (mono) amplifier circuit, for stereo audio system, you should build two similar circuit. Power supply with… Read More »
Here the great 35W power amplifier with single IC STK-082 from Sanyo Semiconductor. Simple circuit with high power output.. 🙂 This circuit uses symmetrical (dual polarity) power supply with maximum power voltage is 43V based on the datasheet document. The recommended voltage operation is +/- 30V. For stereo application, you just need to build two… Read More »
This is a very simple FM receiver which build based on one transistor only. No chip or another active component. The output is connected to earphones, you need an amplifier circuit if you want to listen the radio with a loudspeaker.
This is 0-24VDC digital PIC power supply circuit. This variable power supply controlled with PIC microcontroller. There is LCD display in this circuit which will show the actual value of power supply output. This power supply use push on switch to adjust the output voltage and current value. Schematic Diagram: Component List: C1 = 2000uF… Read More »
This is the circuit diagram of stereo power audio amplifier using power IC LM4756. The IC have the capability to deliver dual output channel at 7W for each channel. Like the other audio amplifier circuits, this circuit just need a few external components to work. Circuit Application: PCB Design: This is the PCB design for… Read More »
This is another stereo / dual power amplifier circuit with power IC KA series. This amplifier delivers dual power output (stereo) at 1.2W for each channel. General The KA2214 is a monolithic integrated dual audio power amplifier in a 14-pin plastic dual in line package. It is designed portable audio sets.