In this circuit, the infrared emitter IRED1 is modulated by connecting its anode (A) to ~38kHz signal yielded by D9 of the Arduino Uno (TP1) while its cathode (K) to a ~1kHz signal available at D8 of ...

Old infrared remote controls can be a great way to interface with your projects. One of [AnalysIR’s] latest blog posts goes over the simplest way to create an Arduino based IR receiver, makin… ...

The GP2Y0A21YK0F (2Y0A21) is an analog output type distance measuring sensor unit, composed of an integrated combination of position sensitive detector (PSD), infrared emitting Diode (IRED) and signal ...

Part 1 of this two-part series introduces transimpedance amplifiers and describes their application in laser rangefinders and LiDAR systems.

As an example, [Circuit Valley] has an IKEA Vallhorn motion sensor for a teardown, it’s as you might expect, a passive infrared sensor (PIR) sensor coupled with a Zigbee interface.