Mini POV4 Moderators: adafruit_support_bill, adafruit

[mbkhali]

I have soldered a mini POV4 kit i bought from here
I am using windows 10
With the USB adapter
It lit up when i turned the battery on
The second LED from the left and the second LED from the right do not light up the rest just flicker red
I think the 8-bit micro controller is defective

[adafruit_support_carter]

Some of your solder connections look like they could be under or cold soldered. Take a look at this:
https://learn.adafruit.com/adafruit-gui ... n-problems
and then try reflowing any connections that look like they might not be making good electrical contact.

[mbkhali]

I have already tried that and resoldered them but it’s the same output. When I push down really hard on the micro controller all the lights light up but just red

[adafruit_support_carter]

That really sounds like some sort of electrical connection problem. By pressing down you're somehow forcing the connection closed. But there could also be other connection issues that are not being solved by the pressing down. Are the photos you posted of the reworked soldering?

[Mkhalil2]

No that was from the first time, the second time I resoldered all the components that looked like they needed resoldering

[adafruit_support_carter]

Post photos of the new solder job.

Does it show up at all when you plug it in via a USB cable to your computer? As described here for uploading new images:
https://learn.adafruit.com/minipov4-diy ... oad-images

[mbkhali]

I haven’t plugged it in yet because when I followed the steps it said it would light up the test image first which it didnt

[adafruit_support_carter]

Yep. It should. From the guide:

Wait three seconds for the MiniPOV to 'boot' and you'll see the red, green and blue LEDs light up in order. Then the LEDs will flicker white.

The LEDs are basic RGB LEDs, with each color (red, green, and blue) controlled by a separate signal. By seeing only red, it indicates the possibility of a signal issue with the other two colors. There are several solder points that could cause this. If you post a second photo of the current solder job I can try and see if any of those specific points look like they might still have an issue.

The idea with plugging it in with a USB cable is just to provide another check.

[Mkhalil2]

Here is my updated solder now only one LED does not flash and the rest flash red on a repeated loop

[adafruit_support_carter]

Hey, mbkhali, I'll check out your soldering when I get a chance to compare to the schematic. In the meantime, can you try plugging it in to your computer via a USB cable and see if it is recognized at all.

[mbkhali]

I get a notification that a device has been plugged in

[adafruit_support_carter]

Cool. It sounds like the chip is working and the USB connections are good. Give me a bit to take a look at your last photo and check it against the schematics and Ill get back to you.

[Mkhalil2]

yes but it says usb device not recognized

[adafruit2]

hmm - i see a ton of shorted pins there, from solder being dragged
are you using rosin-core electronics solder? what iron are you using?

[Mkhalil2]

I’m using Rosin Core solder