#3: Hummingbird Earrings Look Amazing!

A project log for 52 Boards

1 PCB a week for a year.

morganmorgan 07/23/2020 at 06:135 Comments

These came out beautifully! I feel like I couldn't be happier with them, even though several improvements are going to be made. First of all, I don't think I ever even bothered thinking about the battery. LEDs are simple right? we light them with coin cells all the time right? Welll., the coin cell I reaaaally wanted to use was this great and tiny LR44 @zakqwy used in the #cyborg ring. What I had forgotten is he uses 2 in series to get 3V. Womp, doesn't matter going to bodge a CR927 clip on there are fix in the next revision, because this certainly deserves another revision.

Additionally I'm going to do a full ground pour on the back (I actually thought I did this....) and a copper silhouette on the front side. The back I hope will reflect light and the front will block the bleed through that can be seen above the lower LED. I may also move the LEDs a bit in an attempt to light up more of the bird.

I also really like this picture as it really shows off how the footprint works, which was quite interesting to solder.  As there isn't much copper around it, getting an iron on it was difficult. I ended up smearing solder paste into the slots and on the LED pads and using hot air. This worked out pretty well. The only other real issue I encountered was tiny copper burrs caught in the slot. One can be seen in the lower right slot of the left earring. They were easy enough to pick out and the copper in all of the slots looked fine.

All in all really happy. I'll have the new battery clips early next week and will show off some more complete build pictures.


Simon Merrett wrote 07/23/2020 at 21:01 point

I'm glad board revs are part of the 52. Gives opportunity to follow up the more interesting ones. They look lovely. 

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morgan wrote 07/23/2020 at 21:16 point

Yeah, it was really the only way to make this semi-sustainable, which is still to be determined.

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Gerben wrote 07/23/2020 at 15:43 point

Interesting way to place the led. Thank you for sharing.

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zakqwy wrote 07/23/2020 at 11:28 point

these are lovely!!!

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morgan wrote 07/23/2020 at 06:14 point

It should be noted: On my projects list is "learn to do mouse bites"

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