The part list consists of one Arduino, two resistors, and one IR emitter. That’s right, an emitter. When an LED (IR or otherwise) is reverse biased it can act as a light sensor.

IR emitter 1 Articles Bare Bones Arduino IR Receiver May 30, 2014 by Nick Conn 7 Comments ...

IR Receivers: IR receivers are designed to detect these pulsed infrared signals and convert them into electrical signals that can be interpreted by a microcontroller like the Arduino. Modulation: To ...

Arduino-Serial-IR Jonah Winchell Digital Network Infrastructure, Spring 2025 This project outlines one transmit and one receive module for RS323-compliant serial communication via IR. To transmit ...

In my case I have used only 3 x 330Ω resistors, 3 leds and a TSOP4838 IR receiver module. You must check the datasheet before use the IR module to see which pins connect to the power supply and which ...