Audio Amplifiers

1 Watt Audio Amplifier. 8 Ohms impedance. 20 Hz to 20 kHz. Small, few components.

This simple stereo audio amplifier will amplify audio for your low-medium impedance headphones and give you left/right balance control

Describes the schematic (circuit diagram) and PCB (Printed Circuit Board) for a cheap 100-150 Watt audio amplifier with few components.

This audio amplifier electronic circuit uses MOSFET transistors to create more than 25 Watts output power. Uses IRF530 and IRF9530 MOSFET transistors.

High quality 25 watt audio amplifier. Combining 2 would give a 50 watt stereo amplifier.

Variable gain audio amplifier capable of powering a small speaker for personal use

This kit uses the TDA2009 class AB audio amplifier IC for high quality stereo applications.

Shows an electronic circuit diagram (schematic) for a simple 10 Watt audio amplifier, using only 4 transistors.

PCB plans and circuit diagram (schematic) for what appears to be an extremely nice 100 watt guitar amplifier. Includes preamplifier and power amplifier circuit diagram and PCBs

Amplifier circuit for electret microphones (condenser microphones). Amplifier the audio signals picked up by the electret microphone, using 741 op-amp and a 2N2222 transistor.

2 channel (Stereo) Audio Amplifier with 1 watt per channel.

A Mono audio amplifier which produces a very good 7 watts output power.

2 watts of power across to channels is what this kit delivers. Great quality.

Schematic for an electronic audio level VU meter that uses LED's to display the volume/audio levels.

Amplify tiny audio signals fifty times with this electronic kit, and deliver them to a power amplifier cleanly and undistorted. AGC (automatic gain control) eliminates distortion. This circuit is useful in boosting the output from tape heads, microphones

This is a RC car project is the transmitter and receiver modules for a Remote Control car, with speed control and continuous steering.

MicroStrip 2.3 GHz (GigaHertz) RF amplifier with 1 Watt RF output power.

Flash you car's headlights on/off, either together or alternatively, with this flashing lights electronic circuits. Don't know if it's legal but it's pretty cool :)

18 Watt Mono Audio Amplifier. Possible to use two for Stereo sound.

An exciting way to demonstrate the use of alternative energy. It features an aerodynamic sports car shell design with a transparent car body that can be painted or left clear to view the inner mechanics, 4 wheel chassis, powerful 1.4 volt - 350mA solar ce

This circuit is an alarm for the home, car and a lot more. It employs a magnet and reed switch to trigger the circuit. An intergral piezo sounder produces the alarm sound (100dB). There is also a relay capable fo handling up to 10 amps that will switch wh