Features: Hardware components: Arduino, relay module, jumper wires, and external power source Code: Arduino code for controlling the relay based on sensor input or a manual switch Applications: Home ...

Working of LDR controlled LED using Arduino As per the circuit diagram, we have made a voltage divider circuit using LDR and 100k resistor. The voltage divider output is feed to the analog pin of the ...

The wiring diagram PDF and many product pictures show that the relay is a 3V relay (SRD-03VDC-SL-C). However my board which I got from eBay arrived with a 5V relay (SRD-05VDC-SL-C). Everything works ...