High-Fidelity Siren Circuit Diagram

How Does Simple Hifi Siren Circuit Diagram Work? Hifi siren is similar to police siren. In the beginning the sound is weak and than goes stronger and than goes weaker again. If the start switch S1 is pushed, flip-flop around N3 and N4 slowly down. This will cause the...

Simple Sound Level Meter Circuit Diagram

How Does Simple Sound Level Meter Circuit Diagram Work? This circuit is used to measure the voice level produced by the microphone. When the switch is in close state, the sound of microphone is low, the resistance of microphone will be high, and the output of divider...

Simple Digital Volume Control Circuit Diagram

How Does Simple Digital Volume Control Circuit Diagram Work? This circuit is a simple audio volume control using by only one IC DS 1669 and some additional components. S1 serves as audio volume increaser, while S2 serves as audio volume decreaser. Digital Volume...

Simple Alternating Flasher Circuit Diagram

How Does Simple Alternating Flasher Circuit Diagram Work? The main component of this blinking lamp circuit is three IC 555 used as astable multivibrator. The first IC 555 is 1 second timer, the ON/OFF switch to the other two timers. Diode is useful to protect IC 555...