Hello,
I carefully assembled this kit yesterday and have found that LED 1 flickers at a considerably lower rate than the others. LEDs 5 and 7 only display in white when warm—i.e. after soldering. As soon as they cool down, the green component goes out. It should be noted that some of the LEDs’ leads were bent when I received the kit. I have gone over entire board to look for solder bridges or bad joints—everything looks good. All flux has been cleaned off as well. Still, as soon as 5 and 7 hit room temperature they act up along with 1 flickering very slowly.
UPS may have been rough with the package...
MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs are
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- tmc1233
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MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs are
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Re: MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs
Can you post another photo showing the soldering on the backside. With ambient light so the LEDs don't wash out the image.
- tmc1233
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Re: MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs
As requested, here is the back side of the circuit board. Thank you for any help you may provide.
~Todd
~Todd
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Re: MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs
Are you running it with the code it shipped with? So that you can run this test:
https://learn.adafruit.com/minipov4-diy ... it/testing
Your soldering looks generally OK. Check the few things I've shown in the image below.
https://learn.adafruit.com/minipov4-diy ... it/testing
Your soldering looks generally OK. Check the few things I've shown in the image below.
- A = hard to tell, but maybe a little under soldered
- B = fuzzy stuff, if it's something conducting could be shorting things
- C = is there a solder short here?
- tmc1233
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Re: MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs
Thanks for looking at this. I have fixed the items that you pointed out, and a few others. Strangely, I have run into more issues! I’ll get this sorted out yet!
I have not introduced my own code into the module...
It was tough to see the self test, as it is so fast—it cycles in less than a second. I have checked all of the things that you have suggested, and a few more. LED 1 still seems to flicker at half the rate of the other LEDs. Now, LEDs 2, 4, and 5 are not displaying green. This has been verified by videoing the start up in slow motion. I have posted video here: https://youtu.be/ewV7Z319ceY
I have not introduced my own code into the module...
It was tough to see the self test, as it is so fast—it cycles in less than a second. I have checked all of the things that you have suggested, and a few more. LED 1 still seems to flicker at half the rate of the other LEDs. Now, LEDs 2, 4, and 5 are not displaying green. This has been verified by videoing the start up in slow motion. I have posted video here: https://youtu.be/ewV7Z319ceY
- tmc1233
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Re: MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs
Any further assistance would be appreciated.
- adafruit_support_carter
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Re: MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs
Sorry for the delay. That video helps, thanks for that. For only the green channel to not be working on specific LEDs, it kind of indicates either a soldering issue on the green channel pins or something wrong with those pixels.
Can you post another photo showing the backside of the board after you've made the repairs.
Can you post another photo showing the backside of the board after you've made the repairs.
Were any of them so badly bent that they were broken off, or even about to break off?It should be noted that some of the LEDs’ leads were bent when I received the kit.
- tmc1233
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Re: MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs
They were not broken off, but I wonder if there was internal damage. It seems odd that the LEDs only work when heated (expansion of metal across a tiny split?).
I have bought replacement LEDs and will check to see if they help.
I have bought replacement LEDs and will check to see if they help.
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Re: MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs
Maybe. I think these do have tiny wires inside that bring the external pins down to the actual LED dye. But why only green? Guess it could just be the luck of the draw.They were not broken off, but I wonder if there was internal damage.
Awesome. That's going to be a bit of resoldering work, cool that you're up for it. Yes, please let me know what happens with this. Sorry this is being so problematic.I have bought replacement LEDs and will check to see if they help.
- tmc1233
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Re: MiniPOV 4 Kit - DIY Full-Color POV and Light Some LEDs
Wow, I just saw your reply after all these months. I am finally ready to use the MiniPOV and now this: viewtopic.php?f=11&t=141045
Please be positive and constructive with your questions and comments.