Optical Sensing Circuits

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25W 230VAC small size ballast using IR2520D
8 Channel PWM with AT90S1200
Video Switcher with PIC16F819
AVR terminal for serial port
burning hex files using usbasp
Modular Phono Preamplifier
Low pass filter for subwoofer
Tube preamp tone control
22 Watt Audio Amplifier Circuit
Dicing With LEDs
10 Way Electronic Switch
Multifunctional motor protection circuit