Car Audio Circuits

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25W 230VAC small size ballast using IR2520D
ATMEL 8051 Flash Based-Microcontroller Programmer
Oscillator operates from one cell
8W Amplifier Based on IC LM383
5V Boost Converter using LTC3440
Whats the third wire on a piezo buzzer
op amp Reducing noise in audio circuit (optical pickup + op amp)
Versatile FM Transmitter
microphone Microtech Gefell UM 92.1 S
The worlds smallest pong game
Interface Circuit for PC Soundcard Oscilloscope
LED Hat
Simple Moisture Detector
Spectrum monitor with memory function circuit



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