Re: [Paparazzi-devel] YAPA v2.0 Hardware failures

[Romney, Jefferson S]

I remembered somewhat wrong. I went back and looked at them again. There are 
four that have gone bad:
1. This one happened just as I said. the 5v regulator went bad like you 
mentioned, and the 3.3v line is shorted to ground. but the 5v line is not 
shorted. 
2. This one turned on, but gave bad pwm signals to the servos. as far as i 
remember, this one never actually quit completely.
3. This one a wire came loose and shorted so no question there.
4. on this one I plugged it in the other day and c38, the big capacitor on the 
bottom went up in smoke. battery voltage is shorted and 5v is shorted but the 
3.3v line is not. my guess is that this may be a short in the power supply as 
well.
5. This one I thought had done the same as #1 but on further investigation, i 
found it was the barometer not the autopilot itself. when I unplugged the baro, 
it worked fine.

I guess I really only have questions about 1 and 4.

Thanks,
       -Jefferson Romney

________________________________________
From: address@hidden address@hidden on behalf of Chris Gough address@hidden
Sent: Wednesday, June 27, 2012 9:14 PM
To: address@hidden
Subject: Re: [Paparazzi-devel] YAPA v2.0 Hardware failures

I've never seen that before. How does the power supply smell?

Chris Gough

On Thu, Jun 28, 2012 at 12:50 PM, Romney, Jefferson S
<address@hidden> wrote:
> I have been using Yapa v2 autopilots and loving them, but I have had some of 
> them fail for no apparent reason. has anyone else seen this?  Usually it 
> works once, I unplug it, and plug it back in and nothing turns on and it 
> won't work again. Any ideas as to how I can prevent this?  Thanks for any 
> information.
>
>  -Jefferson Romney
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel



--
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