I will give information about how the HC-SR501 PIR motion sensor module works, HC-SR501 Features and its use with LDR. The HC-SR501 PIR sensor module can be used not only for security, but also for most automatically activated lighting... Electronics Projects, Dark and Motion Activated LED Lamp HC-SR501 LDR Triac Relay Mosfet "led projects, power electronic projects, " Date 2022/02/27