This Simple Multi Siren Tones Circuit using the UM3561 chip works like a small sound box for emergency vehicle sounds. Moreover, the special UM3561 chip can create many siren noises, such as the “wee woo” sound of a police car or the fast tone of an ambulance. Furthermore, it only needs few more parts and […]
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. However, 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 […]
Full Duplex Audio Line Circuit
To begin with, Full Duplex Audio Line Circuit is like a strong talking line, where 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. […]
Squelch Circuit
Squelch circuits are like the radio peace assistant!; and 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; also the best thing about squelch is its very easy and works with many […]
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. Also, this small thing work like alarm sound toy which is good as warning. But not just one boring sound it makes many loud noise one after one or same time!; and it works well […]
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. Here, Audio Compressor Circuit does this job it move knob by itself and when sound is too loud it make little lower and when it is too quiet it push it little […]