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Audio Amplifiers

Photo: One Watt Audio Amplifier One Watt Audio Amplifier
1 Watt Audio Amplifier. 8 Ohms impedance. 20 Hz to 20 kHz. Small, few components.
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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.
Photo: High Quality 25 Watt Audio Amplifier High Quality 25 Watt Audio Amplifier
High quality 25 watt audio amplifier. Combining 2 would give a 50 watt stereo amplifier.
Photo: Electronic Circuit: Audio Amplifier Module Kit Electronic Circuit: Audio Amplifier Module Kit
Variable gain audio amplifier capable of powering a small speaker for personal use
Photo: Stereo Audio Amplifer - 10 Watts Stereo Audio Amplifer - 10 Watts
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
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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.
Photo: One Watt Stereo Amplifier (2x1 Watt) Electronic Kit One Watt Stereo Amplifier (2x1 Watt) Electronic Kit
2 channel (Stereo) Audio Amplifier with 1 watt per channel.
Photo: 7 Watt Mono Audio Amplifier 7 Watt Mono Audio Amplifier
A Mono audio amplifier which produces a very good 7 watts output power.
Photo: 2 Watt Stereo (2 Channel) Audio Amplifier 2 Watt Stereo (2 Channel) Audio Amplifier
2 watts of power across to channels is what this kit delivers. Great quality.
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Schematic for an electronic audio level VU meter that uses LED's to display the volume/audio levels.
Photo: Stereo Pre Amplifier Kit Stereo Pre Amplifier Kit
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.
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MicroStrip 2.3 GHz (GigaHertz) RF amplifier with 1 Watt RF output power.
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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 :)
No Photo Available 18 Watt Mono Audio Amplifer
18 Watt Mono Audio Amplifier. Possible to use two for Stereo sound.
Photo: Knight Invader Solar Car Knight Invader Solar Car
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
Photo: Home Car Alarm Security System Electronic Kit Home Car Alarm Security System Electronic Kit
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