Here is the diagram of my Arduino infrared close proximity sensor. As you can see, ... Apart from the Arduino UNO, the circuit consists of two more primal parts – an infrared emitter and an infrared ...

The hardware is consists of an Arduino microcontroller (here an Arduino Uno R3) and a pre-wired soil moisture sensor module. The soil moisture sensor module , built around the LM393 comparator, gives ...

It shines an IR led at the floor and picks up what reflects back. [Sean] added this hack because the gyro sensor he ordered hasn’t arrived yet. The board has a trimpot which is used to adjust ...

3. IR LED driving circuit. Based on experience, the TIP121 Darlington transistor is a good option for this application. This device will allow us to drive a high current load with a low base current.