This Public Address Amplifier Circuit works like a very strong loudspeaker for our voice! When we speak on microphone then it makes our voice go very loud because of that many people can hear us good. Hence, this circuit is good for big place like school, office, stadium or parties where we want all people […]
Audio Circuits
Simple FET Preamplifier Circuit
To begin with, this Simple FET Preamplifier Circuit works like super booster for small sound, as it uses special transistor, FET to make quiet sound go more loud. Also, this circuit is very good, because it uses two kind of transistors N channel FET and PNP bipolar, together they make sound strong and not bad. […]
Simple Multi Siren Tones Circuit using IC UM3561
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 […]
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 […]