How to Connect ITX LED and Button Connectors?

[creedpatton]

I have searched and asked around for help with this, but to no avail. I'm trying to connect a LED and push button to the Mister I/O board, but have not had any success. I realise there is a schematic for the white LED and button headers, but nothing I've tried has worked. I may even have blown the LED doing this. I was able to get the button to work on a Raspberry Pi, so I know it works. The main issue is that I don't know how to correctly connect the ITX Front Panel connectors to the white headers on the Mister (marked LED +, LED -, POWER SW). Do I need some kind of adaptor (JST-XH)?

Any help will be greatly appreciated!

[creedpatton]

UPDATE: I have managed to frankenstein some wires well enough to get the button working. Still absolutely no luck in getting the LED to work. I've tried another LED as well, and still nothing. What am I missing here?

[davewongillies]

I used a Pololu 2808-LV Pushbutton Power Switch in my build. Power LEDs and momentary power switch works for power on/off.

[creedpatton]

Hi! Thanks for answering! I managed to get the button to work (connected to Pins 3 and 1 on P3), but I've had no luck getting the LED to work connecting to pins 6 or 5, and 2 on P4. I've also read something about needing a 330 Ohm resistor connected to the LED? Is this why it's not working fro me?

[Arakon]

If that's Taki's board, the resistors are preinstalled.
Connect + of the LED to pin 1 (closest to the fan) and - of the LED to pin 2.
Note however that the white LED runs on 3.3-3.5V usually, so the resistor values may actually be too high for it to get enough power.

[creedpatton]

@Arakon, thanks so much for your reply! This is exactly the kind of info I have been trying to find out! Unfortunately, I tried the pins you mentioned with a working LED, and no luck. I'm thinking that it has to do with resistor values you mentioned. Is there any hack I can do fix this?

[creedpatton]

I finally got the LED and button to work correctly.

I'm answering my own question here to give anyone wondering how to get the external button/LED of a Commodore C64X case working.

Button: PWR+ goes to pin 1 and PWR- goes to pin 3 (labelled P3) for Reset on push.

LED: LED+ goes to pin1 (+5V) and LED- goes to pin 3 (for disk access) on the 7-pin connector on the I/O board (Labelled P4).

This is how I have them wired and it works. I don't think the +/- matters in this case.