Latching Touch Sensitive Alarm Circuit on breadboard | 555 Timer project #2

Опубликовано: 15 Март 2026
на канале: Elonics - Electronics Projects on Breadboard
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A Tutorial on How to make a Touch alarm / Touch sensor circuit that latches the output whenever our skin (finger) or any object with negative charge gets in contact with a touch wire. An explanation of how this circuit works is also included in this video.

The link to project page & circuit diagram: https://elonics.org/touch-sensor-alar...

Link to previous tutorial (Touch On - Touch Off circuit):    • Latching Touch Sensitive Alarm Circuit on ...  

Components required:
555 Timer IC
BC547 (You can use any npn transistor)
A buzzer
LED
Momentary Push Button Switch
Resistors 1 x 10K, 1 x (The series resistor for LED's)
Breadboard
Few Breadboard Connectors
(5-12)V of DC power supply



This channel has a lot more electronics projects & 555 timer projects. So feel free to check them.

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