As found in the schematic of the generic PIR motion detector module, one pin of the LDR goes to ground ... The code is an Arduino project for the Digispark Attiny85 to turn on a light source when the ...

In the microcontroller era today, Arduino is ... Here an LDR (Light Dependent Resistor) is used to measure the light level. The alarm system is triggered when a “Logic High (H)” level signal is ...