3 Homemade Alarm Systems – DIY Security Projects
2:45
YouTube99d
3 Homemade Alarm Systems – DIY Security Projects
In this video, you’ll learn how to make three homemade alarm systems from scratch! Each project uses basic materials and simple circuits — no microcontrollers needed. Motion sensor alarm — detects movement instantly Magnetic door alarm — activates when the door opens Light-sensitive alarm — triggers when light changes These are fun ...
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