Cricket Sound Generator Circuit
This cricket sound generator circuit uses the LM324 OP-AMP as a frequency generator and a buzzer to emit sound without using ROMs. Read more
Audio Circuits
Simple Telephone Ring Amplifier circuits
The telephone repeater circuit or The call signal peripheral circuit to the loud than the original,with a buzzer or a electric bell, to increase loud sound Read more
Audio peak limiter circuit to improve input signal
The simple audio signal overload protection circuit. Why use it? it will protect input of power amplifier away high amplitude, more than1Vrms. Easy circuit! Read more
3 Police siren circuits using 555 timer
Here are police siren circuit using IC 555 with PCB layout. It uses IC 555s as a frequency generator and a transistor to drive the speaker. Read more
Treble Booster circuit using IC-741
t is Treble Booster circuit help give the sound of music that you listens to bright go up. it is cheap, easy to build because a few pats with IC-741. Read more