The DigiX > DigiX Support

DigiX SMOKE! (thread should have been here)

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Solice:
If you wanted to try it, you can feed 3V3 into the appropriate pin to try an external power circuit, as long as the ground is common.  When I was mucking with the board, about 200 mA was good enough for most of the time, but I saw spikes up to 600 mA on that line.  Depending on the parts you have available, you MIGHT be able to put two parallel regulators together, hoping the current path doesn't prefer one too heavily due to different binned parts with significantly different resistance.

exeng:
Yep thought about doing that. I'll give it a try.

BTW, lifted the damn tab pad on the regulator when trying to remove the part (should have been more patient). It's going to be some ugly rework when the new regulator part arrives but I think I can do it.

PeterF:
Ouch! Yeah, I'd probably try the external 3v3 power before replacing that part, just in case something else important... (you know, like the MCU... that's pretty important!!! :-P) got wiped out as well  :'(

Ah, reminds me of a recent issue we had with a radio... the transmitter section was fine, but the receive section was stone deaf... and since it's a 30+ year old radio, a lot of it's components are obsolete... at it was going to cost 5 pounds plus god knows how much in postage just for one itty bitty surface mount RF four-legged mosfet package... since it was a second hand radio, it was getting a bit too much to be bothered with, especially if it was more than that that had been whipped out by the prior owner... :sigh:

exeng:
Yeah, don't know if more than 3V escaped the regulator on the output. I hope it died a lonely death and didn't bother anyone sitting the 3.3V rail. Losing my optimism though, as 3.3v in the 3.3v pin lights the pwr LED but I can't really test anything else, and MC gets very warm. It may be toast. I'll know for sure when the regulator comes in.

I'll really miss my DigiX if it's dead. I can handle the $60 loss.

Solice:
I suppose one last thing you can do just for posterity is to hook up a multimeter in series with your power source to see how many amps it's drawing.  If it's very high, then you may have a shorted or fused part.

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