I have not worked with a cheap RGBW Par LED Spotlight before ... Below is the inside view of the standard 3-pin XLR female connector used in my Arduino-DMX experiments. This is a crude schematic of ...

To the human eye, it looks like multiple LED’s are lit up simultaneously. [Alex] planned to use an Arduino to control this display, but it doesn’t have enough outputs on its own to control all ...

We added a Qwiic connector on the side of the board which basically ... “So for instance, you can have one Arduino with a button, another Arduino connected wirelessly with an LED, push the button and ...