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 ...

Moreover, the S16-L221D sensor lets you add a light dependent resistor (LDR). It is not very ... Following is the Arduino Sketch, tailored for Digispark Attiny85 Development board! /* * Grove-mini PIR ...