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MiniPOV 4 problems
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MiniPOV 4 problems

by chinga on Fri Sep 30, 2016 12:25 pm

Hi, all -

I just soldered together my MiniPOV 4 kit, and when I turn it on, the LEDS light up red and blue, but not green. Also, when I plug it into the computer, no software pops up. Any ideas what needs to be/can be fixed?

Thanks!

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Re: MiniPOV 4 problems

by franklin97355 on Fri Sep 30, 2016 7:56 pm

Could you post large (less than 1meg), clear, detailed pictures of both sides of your board showing any soldering you have done and the connections to it?

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Re: MiniPOV 4 problems

by chinga on Mon Oct 03, 2016 11:10 am

Here you go! Thank you so much for any advice.

(I know the negative battery lead isn't connected - the wire broke after I ran the test on the device. Another thing to fix! Being a beginner is a joy!)
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Re: MiniPOV 4 problems

by adafruit_support_rick on Mon Oct 03, 2016 11:51 am

You're on Windows?
Open device manager and see if the MiniPOV shows up. It should be recognized as a USBtiny under libusb-win32 devices:
Image

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Re: MiniPOV 4 problems

by chinga on Mon Oct 03, 2016 11:56 am

No, I'm on a MacBook Pro.

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Re: MiniPOV 4 problems

by adafruit_support_rick on Mon Oct 03, 2016 12:12 pm

Then there is no popup. when you first plug it in. Go ahead and skip to the part of the tutorial about running Processing.
https://learn.adafruit.com/minipov4-diy ... d-software

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Re: MiniPOV 4 problems

by adafruit2 on Tue Oct 04, 2016 5:57 pm

looks like one of the DIP pins on the chip is bent and not inserted

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Re: MiniPOV 4 problems

by adafruit_support_rick on Wed Oct 05, 2016 11:35 am

Ooo! Good eye! I missed that.

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Re: MiniPOV 4 problems

by bodger on Wed Nov 16, 2016 12:10 am

I just put together my MiniPOV 4, and two of the LEDs work fine for red and blue, but not green. I thought about it for a while, and since the LEDs light, that tells me that their I/O pins and current limiting resistors are OK, and since the others work for green, that tells me the I/O pin, transistor, and base resistor for green is OK as well. That leaves a problem in the PCB trace, a bad solder joint, or two LEDs that don't work right. The datasheet doesn't make it clear which pin is green, so I pulled up the board design in EAGLE, but that signal isn't named. I went to the schematic and named the red, blue, and green LED drive signals, then was able to match them with pins on the board view, so I know which pin is green. I measured with a continuity tester, and the pins are connected to the other green pins. I also tried probing those pins with an oscilloscope with the unit running (up high near the LED, not just down at the solder joint), and they show the same signal as the other LEDs. Therefore I think the problem is with those two LEDs. I really don't think I overheated them while soldering. I did try reheating those joints just in case, but that didn't cause improvement.

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Re: MiniPOV 4 problems

by adafruit2 on Wed Nov 16, 2016 12:18 am

bodg, email support@adafruit to get 2 more LEDs

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Please be positive and constructive with your questions and comments.