MiniPOV4 not working

MiniPOV4 and previous versions

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halr
 
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Joined: Fri Mar 25, 2016 10:41 pm

MiniPOV4 not working

Post by halr »

I soldered together the MiniPOV4, plugged in power and nothing. None of the LEDs light up. After checking for soldering mistakes, I checked these forums. I checked that pin 7 (VCC) on the chip is getting power, it is. Here are my soldering images:
IMG_2727.jpg
IMG_2727.jpg (141.95 KiB) Viewed 1692 times
IMG_1219.jpg
IMG_1219.jpg (137.01 KiB) Viewed 1692 times
Here is the kit sticker:
IMG_4533.jpg
IMG_4533.jpg (121.79 KiB) Viewed 1692 times
I gather that some of the chips might have gone out unprogrammed.

Thanks,
Stay safe,
All the best.

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adafruit_support_carter
 
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Re: MiniPOV4 not working

Post by adafruit_support_carter »

Can you post another photo of the bottom side with the solder job. It's a little out of focus.

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halr
 
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Re: MiniPOV4 not working

Post by halr »

Here's a better picture. I did check potential shorts with my multimeter.
IMG_6235.jpg
IMG_6235.jpg (184.53 KiB) Viewed 1688 times
Would it possible program the chip myself using an Arduino and six pin ISP?

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adafruit_support_carter
 
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Re: MiniPOV4 not working

Post by adafruit_support_carter »

Thanks for the additional photo. It may be connection related. There may be a few pins that are cold soldered and not wetted out enough on the pads. See here:
https://learn.adafruit.com/adafruit-gui ... n-problems
Visually check your pins and for any that seem like they may be like this, go back with the soldering iron and try and reflow them a bit.

The firmware is here:
https://github.com/adafruit/Adafruit-MiniPOV4-Kit
if you have the ability to program the chip. But it should have come programmed. So try the soldering first.

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