This Simple Multi Siren Tones Circuit using IC UM3561 chip is like small sound box for emergency car sound. This special chip UM3561 can make many siren noise like police car “wee woo” or ambulance fast tone. It only needs few more parts and one speaker, then this circuit can make those sound come alive. […]
Audio Circuits
Simple IC TDA2822 Stereo Audio Amplifier Circuit
Simple IC TDA2822 Stereo Audio Amplifier Circuit is small chip with stereo amplifier makes weak music sound go louder which is strong enough for speaker or headphone. Despite using very little energy it still provides 250 milliwatts each side with good sound for small things like walkman, hearing aid or little stereo. So next time […]
Full Duplex Audio Line Circuit
Full Duplex Audio Line Circuit is like a strong talking line. Two people can talk at a same time on one wire like a phone call. Not like a walkie talkie where only one person talk and other wait. But with full duplex both people talk anytime like a actual talking. Circuit Working: Parts List: […]
Squelch Circuit
Squelch circuits are like the radio peace assistant! This small smart circuit stops radio sound when no strong signal connects. So no more hearing of bad noises but only when signal is strong one can hear good sound or video. Best thing about squelch is its very easy and works with many radio types. It […]
Multi-Tone Electronic Siren Circuit
In this article for Multi-Tone Electronic Siren Circuit make it more fun with one siren circuit that makes many sounds. This small thing work like alarm sound toy which is good as warning. Not just one boring sound it makes many loud noise one after one or same time! It works well to get people […]
Audio Compressor Circuit
Think like music have one volume knob. Range that is dynamic? It is how far volume go from very soft to very loud. Audio Compressor Circuit does this job it move knob by itself. When sound is too loud it make little lower and when it is too quiet it push it little louder. So […]