Simple Beep Alarm Circuit Diagram

How Does Simple Beep Alarm Circuit Diagram Work? This circuit will sound a beep. This circuit utilizes IC timer NE555 as a repeating ON/OFF. The first timer circuit will result the oscillating frequency of 1kHz, whilst the second time in ON or OFF state based on the...

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...