Tagged: op amp


Door opening alarm circuit diagram

A door opening alarm circuit is an indicator or a security alert device which activates while opening the device attached door. And the alarm remains ON as long as the door is kept open....


Audio Tone generator circuit using 555, 741 IC

A tone generator circuit can be used for various applications such as alarms, bells, indicators, etc. A tone generator consists of a square, triangle, saw tooth periodic wave generator circuits, commonly square wave generators. Such periodic...


Automatic Light Control Circuit diagram using LDR

These circuits can be used for different automatic light sensing projects including automatic night lamp, automatic street light controller, dark sensor circuits, etc. Automatic night lamp circuit using IC 555 An automatic night light circuit...