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

Step 6 Final Jumpers and PTC Fuse

PTC Fuse:

There is a component right above the USB jack that looks like a diamond, that is the PTC Fuse location. It is a resettable fuse, that increases its resistance if to much current goes through it, it would protect the PC's USB bus from damage in case of a short through. But this circuit can draw a lot of power and to avoid over-loading and breaking the USB bus, it is best to leave the fuse space open with no component, so the circuit is unable to draw any power from the PC's USB bus. The space could also be jumped allowing the circuit to draw off the USB bus, but that is not recommended. It also could be connected to one of the available PIC pins(ExtHeader) to detect bus power.

So it is recommended not to install the PTC fuse or jump it and leave the spot open.


Skip the Rest of this step if using hardware version 2 or higher(green PCB)

There were a few jumpers that needed to be placed last so they could avoid other components.

Use solid strand, well insulated wire

T15 & T16 Jumpers: Signal lines for transistors.

- J15-1 is jumped to J15-2

- J16-1 is jumped to J16-2

Data Jumpers: Jumpers for the USB D+ and D-, I didn't want to run jumpers like this in case of interference but I had no other choice.

- D- goes to D-2

- D+ goes to D+2