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August 26, 2013 at 4:20 am #22618
I just got my Raspberry Pi and OpenSprinkler Pi board installed in my garage last week. It worked great for a few days then the Pi completely died. I took it off the sprinkler controller and tried to power it up with USB power, and never got any video or ACT light on the board.
The logs stop at 7:30-ish on 22 Aug. We had an electrical storm that evening. But since the pi is powered by the OSPi board, it seems a little odd that an electrical storm could have taken out the pi without damaging the sprinkler board. I had anothe pi around, and hooked it up and the sprinkler board seems fine.
So I have a few questions. They do last more than a week for most people, right? What are the odds I just got a defective pi versus lightning taking it out without (apparently) damaging the sprinkler controller? Cheap heatsinks wouldn’t have killed it, would they?August 26, 2013 at 9:16 pm #25457
Are you sure it’s the RPi and not the SD card? I’ve had a couple of SD cards get corrupted, and this results in the power/RED light coming on, but the ACT/green light only comes on briefly. Changing out the SD card to a new one with a fresh copy of the OS fixed this in both cases. I had been using a couple of cheapo 8 GB SD cards, both of which failed. Some new SanDisk class 10 16 GB SD cards fixed that problem, though I really don’t need that much memory for the OSPi’s purposes.August 27, 2013 at 12:30 am #25458
Are you sure it’s the RPi and not the SD card?
Yep. I tried re-seating it in the old RPi, that had no effect. I tried the card from my other RPi (with wheezy) in the dead RPi. I read the sprinkler card in my reader on my computer with no problems, and the backup RPi is now running with that same card. It is a class 10 Sandisk 8 GB (I think).August 29, 2013 at 3:56 pm #25459
@manithree: I suspect that RPi is more fragile to electric shocks or overvoltage damage since it has a lot more components, of which many are sensitive to high voltages. The OSPi board has a relatively small number of components and many of them (like the shift register) can take a lot of abuse.
I damaged my first RPi by simply connecting a digital output pin to GND. That fried the power circuit instantly 🙁
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