The microcontroller running the code is an ATtiny13 on a Sparrow board. He’s using an everyday LED as a detector diode and an internal pull-up resistor in the ATtiny13 for the bias voltage.

Modern LED strips are magical things ... and [Thomas] backs it up by using a thermal camera to illustrate just how hot things can get in mere seconds. Armed with this knowledge, you can now ...

Therefore, LEDs emitting red light cannot be used for white-light generation using phosphors; instead a short-wavelength ultraviolet, violet or blue LED is required. Early attempts to produce blue ...

Mooroopna's main street lit up on Saturday night as more than 40 CFA brigades from across Victoria, and two from Western ...