Door Alarm Security System With IR LED and Cardboard

Today, I will show you how to make a "Door Alarm Security System With IR LED" with a few components:
- 9V battery
- Resistor 100 Ohm
- IRLed
- DC Switch
- Cardboard
#dooralarm #IRled #lifehacks
!!! DO NOT COPY & REUP !!!
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Isme kaya hum rechargeable battery laga sakte hai?

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Bhai iska working likhne k liya kaha se likhu

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Take block diagram
In bio