I'd like to tinker with switching on/off few hundred leds at a time but haven't found a source for a board yet. Bonus points if it'll power RGB colored ones.
There are some serially controlled LED lighting strips, where each LED shifts its state to the next LED when it is given a new state. Thus, to set the state of a strand of 100 lights, you write a new state to the first LED 100 times.
If we assume that, as in your other post, you want to connect 100 RGB LEDs, then you need 100 four-terminal connectors. Assuming you are using 0.1" spacing (I find smaller spacing connectors to be unreliable), each connector will require at least 0.5"x0.75" of PCB space (you need to leave room to be able to plug/unplug the connector). Next each LED will also require a mating connector and 4x whatever length of wire you need and a mounting method.
The first time I had a client who asked me to make up wire harnesses of 60+ wires, 4 feet long, it was a huge surprise just how labor intensive it was to build a dozen of them. And copper is heavy
I want to be able to wire up around 100 leds to a board and then connect the board to serial and/or USB and be able to change the switch on/off and ideally change the RGB of any of the leds independently.