TTVKTR open-source firmware converts old IR remote controls into presentation clickers through Raspberry Pi RP2040 USB boards ...
The most recent Hackaday event badge has been the Communicator, a handheld wireless terminal with a rather nice QWERTY ...
Nailing the basics.
Lasers, LEDs and light sources are devices that create light. LEDs (light emitting diodes) convert an electrical current into light using spontaneous emission in optically active semiconductors.
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