MoBo Power Board won't work with my spinneret

Electrodude

Hi

I just got a MoBo Power Board for my Spinneret. I looked at all of the documentation and it should have worked, but I could only get power to go to either just the 3 pin headers with the jumpers like this:
- and | are jumpers in that direction
o is disconnected

--o
o--

or just the spinneret (but 7.5 volt unregulated power) with the jumpers like this: (the documentation doesn't say to do this)

oo|
oo|

When I did this everything got power, but I don't have a 3-way jumper:

---
o--

Do I need a 3-way jumper (which I couldn't find on Digikey) or did I miss something? I would like to be able to use the 3 pin headers.

Thanks

Phil Pilgrim (PhiPi)

Yes, unfortunately, you need a three-way jumper. And you can blame me for that: I designed the PWR-I/O-DB and did not anticipate this particular combination, since the MoBo has its own 5V regulator sourced from Vin. There are two ways to go about it:

1. Stack two very-low-profile two-way jumpers, although they barely fit.

2. Use one of these and bend the leads over to solder all three together.

The sad thing is that there's a spare pin on the header that could've been used for this purpose.

-Phil

Electrodude

Thanks, Phil. I'll probably just solder the jumpers together, though, as I only ever plan to use this for the Spinneret.

Phil Pilgrim (PhiPi)

Do it on the bottom of the board so you can restore it, if need be, without getting solder on the header pins.

-Phil

Electrodude

OK, thanks.