Arduino Soil Moisture Sensor Circuit – Connection Diagram Now that we have a complete understanding of how a Soil Moisture sensor works, we can connect all the required wires to the Arduino UNO board.

Required Components for PIR Motion Sensor Light PIR Motion sensor Transistor BC547 (NPN) Relay module 12V Led strip Resistor 10k 12V DC socket Connecting wires 12V DC Adaptor / Battery PIR Motion ...