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Reckless Tedium

A project log for blinktronicator

Sixteen different LED colors on a teeny tiny board.

zakqwyzakqwy 12/20/2015 at 19:379 Comments

One shift register down, one to go. No electrical tests yet, but all sixteen leads move with the chip when I give it a nudge. Wire is from a 28 AWG stranded bundle, which turns out to be 7x36.

More to come..

Discussions

K.C. Lee wrote 12/21/2015 at 15:31 point

You could tombstone the part and solder it on the PCB on one side. i.e. chip standing up at 90 degrees and solder fillet between PCB & the vertical pads. That would give you some mechanical support and 6 less wires to worry about.

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zakqwy wrote 12/21/2015 at 15:34 point

That's a great idea, actually. The hardest leads to land were the first ones because the chip wasn't secured. I've still got four boards left that are otherwise worthless, so I might give that a try.

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zakqwy wrote 12/21/2015 at 14:54 point

Thanks! Yeah, it happens--that's what I get for rushing through the whole process, I suppose. 3 ICs is three times the number I've done before on a PCB design--I can't imagine what I'd mess up with a more complicated circuit. Hah!

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alpha_ninja wrote 12/21/2015 at 00:53 point

You're crazy.

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Alex Rich wrote 12/21/2015 at 00:28 point

I'm impressed, did you have a microscope?  the dead bug is really cool looking BTW.  Cover in some clear epoxy or something to show it off.

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zakqwy wrote 12/21/2015 at 02:02 point

Thanks! I'm using a big 3x ring magnifier; might be time to get my hands on a microscope. I'll definitely encase it in epoxy if it works.

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Jarrett wrote 12/21/2015 at 00:24 point

Hot glue is actually the answer here, too, tbh

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zakqwy wrote 12/21/2015 at 14:53 point

Next time I'll definitely take your advice.. getting the damn chip to stay put while I got the first few wires secured was a PITA.

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Eric Hertz wrote 12/20/2015 at 23:23 point

Glad you went with the tedium, I wanna see it workin'! That looks like some bad-ass deadbugging, too.

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