Home › Evil Mad Scientist Forums › LED Matrix Kits › Any suggestions?
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May 17, 2015 at 1:37 am #20442brandonParticipant
Hi there, received my Peggy 2 kit yesterday and I’ve got it all put together, unfortunately it’s not all lighting up for me. Here’s a photo of the current condition: http://i.imgur.com/IZbVqDm.jpg Any suggestions?
May 17, 2015 at 3:12 am #22127Windell OskayKeymasterFor the isolated LED, check the soldering– most likely issue. Could also be backwards or damaged– may need to be replaced.
For the colums out, there appears to be a break or scratch in the vertical wire (trace) on the back side of the pcb. You may be able to see the scratch, but in any case you can repair it by adding an extra wire (e.g., a wire lead from a resistor) across the break or between the two LED leads that are supposed to be connected.
May 17, 2015 at 11:25 am #22128brandonParticipantThanks for the super fast reply! I fixed that isolated one last night right after posting this. Not sure what the deal was but I’m guessing it was a bad LED as it was in there correctly, its replacement is lit up brightly though so that’s great. As for the columns I’ll give that a shot, I looked closely and I don’t see any obvious trace breaks but I’ll try a wire to see what happens. I’m certain those areas are not getting any power as I attempted what was suggested for another person (put a LEDs leads on the backside to test). Thanks again! will report back what I’m able to figure out :)
May 17, 2015 at 11:36 am #22129Windell OskayKeymasterThe LEDs are almost never actually “bad” — in a bag of 1000, I would expect to find zero duds. However, they can be damaged in the installation process, either in the stage of bending out the leads (most likely situation in this case) or during soldering. That’s one of the reasons that we include a few extra in the standard LED packs for Peggy.
May 17, 2015 at 2:45 pm #22130brandonParticipantSo I added a few jumper lines and now we have life! The back of the peggy looks like so: http://i.imgur.com/VZOHtcJ.jpg
Video of it in action: https://youtube.com/watch?v=BczC7h9_W8E
Thanks!
May 18, 2015 at 1:26 pm #22131Windell OskayKeymasterPerfect. You might want to add a drop of hot glue in the middle of each jumper wire, to prevent the wires from getting eventually broken off.
May 18, 2015 at 3:45 pm #22132brandonParticipantThat’s a great suggestion. Much appreciated. :)
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