Applied Science video on SLA printed circuits: https://www.youtube.com/watch?v=Z228xymQYho
Favorite copper plating bath recipe:
Heat 250ml deionized water to 60*C in a 300ml beaker, stirring at 350 RPM
Add 2.5g CuSO4*5H2O, wait until dissolved Add 4.6g EDTA disodium dihydrate, wait until dissolved
Add 0.84ml of 1% Triton-X 100 solution in water Dissolve 5.8g NaOH in 30ml DI water, stir until clear, then add to bath Add 4ml Formaldehyde (37% HCHO)
Lower stirring to 100 RPM and begin filtration with 0.5 micron syringe filter and peristaltic pump.
No intentional oxygenation or bubbling.
Filter return is below surface for minimal splashing.
I experimented a little with PEG and 2 2' Bipyridine, but didn't find them impactful enough to discuss in this video.
LED rectenna designs: https://josepheoff.github.io/posts/1-hatband https://www.nrl.navy.mil/STEM/LEctenna-Challenge/
Electroless copper references: https://www.nmfrc.org/pdf/p0295g.pdf
Copper chromite catalyst: https://www.sigmaaldrich.com/US/en/product/aldrich/209317 Possibly available here: https://www.kremer-pigmente.com/en/shop/pigments/pigments-of-modern-age/spinel-similar-pigments/47420-spinel-black-no-42.html It's been backordered for a month, so I wasn't able to test it.
Open Sauce 2024: https://opensauce.com/Support Applied Science on Patreon: https://www.patreon.com/AppliedScience
Hey! That's pretty cool! You picked one of my projects to demonstrate your PCB manufacturing process.
ReplyDeleteAs small and unknown as my blog is, I'd have never figured anyone would have found it, let alone find that project interesting enough to replicate.
The process is interesting though probably not something I'm likely to pursue - I'm not good with CAD stuff, and generally just eyeball mechanical things and "bash to fit."
Your voltage-adding rectenna is pretty clever! I love finding independent blogs that remind me of the internet from years ago when curation and links mattered. I think that I found your article from a Hackaday post.
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