24 Channel USB Connected LED Controller, upto 1A per Channel

Step 10 Hooking Up LEDs

Hooking the various configurations of LEDs up to to the circuit board is quite easy.

If a transistor is setup to sink current, the LED's cathode is connected to the terminal block.
And the LED's anode should then be hooked to the voltage source with a properly rated resistor in series.

Do not hook any LEDs up without a resistor in series with it, otherwise it will be destroyed as there is no onboard current regulation for the outputs.

When hooking up large amounts of high-current LEDs the main power rail for the transistors should be built up a bit, either solder some solid strand wire all the way down it or, hook up some wire at various points and run them directly to the power supply's GND or V+, whatever is required.

The outputs can be setup to sink higher voltages with no modifications other than connecting all SEL headers to NEG. 

To source more than 5v, all the corresponding SELx jumpers are connected to the higher voltage source, up to 36v.

See Step 2.