Electronic Circuits and Software Related Electronic Chime This circuit simulates a chime similar to the sound many cars make when the keys are left in the ignition. The bottom two gates form a squarewave audi LED Audio VU Meter The LED meter is simpler and smaller than it\'s analogue counterpart, and is very common in audio equipment. This version is based on a National Semic Chu Moy Headphone Amplifier The Chu Moy Pocket Headphone Amplifier is a very simple, yet, quite good sounding amplifier. As the name says, it is intended for use with headphones. Computer Audio Booster Here is a simple amplifier for boosting the audio level from low-power sound cards or other audio sources driving small speakers like toys or small tr Light-sensitive Alarm The circuit detects a sudden shadow falling on the light-sensor and sounds the bleeper when this happens. The circuit will not respond to gradual chan
