kaipereira

28 ms·

1.
by kaipereira 2mo ago
There’s no SAO connector because I wasn’t thinking too straight at 4am designing these badges, but I’ll make sure to add one in future badges, because I agree that they’re really cool!
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Show HN: I made alchemical-cosmological PCB badges(github.com)
24 points by kaipereira 2mo ago|3 comments
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by kaipereira 5mo ago
I’m working on 2 hardware projects right now! Fold-up, scissor lift, cross-cantilever 3D printer for open sauce M.2 FPGA hardware accelerator devboard All just for fun and open source https://github.com/kaipereira :D
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by kaipereira 5mo ago
I personally love this macropad tutorial and it's how I got into doing circuit board design in highschool: https://hackpad.hackclub.com/ . Before doing this, it's really helpful if they have experience messing arou
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by kaipereira 5mo ago
This is insanely cool, the noise they make is also really satisfying! What was the cost/time breakdown of the entire project because the flipdisc prices are hidden behind quotes and it seems like it would take quite a lot of time to co
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Making RAM at Home [video](youtube.com)
627 points by kaipereira 6mo ago|180 comments
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by kaipereira 6mo ago
Thanks so much!
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by kaipereira 6mo ago
This is so cool! I'd love to see a write-up on how made it, and what you referenced because designing neural networks always feel like a maze ;)
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by kaipereira 6mo ago
We ordered the PCB's and badges separately, but it's extremely easy to assemble, you just attach the eink on using the FPC connector and the badges are already in a complete setup of the hardware if you get PCBA. You can make it m
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by kaipereira 6mo ago
Yeah the RP2040 is a bit overkill, but it's really cheap to get from JLC, easy to prototype FAST and easy if anyone wants to reference the design and create/program their own badges. I have been looking at some other MCU's li
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by kaipereira 6mo ago
I used https://eds.st.com/antenna/#/ to get an antenna that fit with a target inductance of 4.7uH and then used https://github.com/nideri/nfc_antenna_generator to create the footprint which I
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by kaipereira 6mo ago
So the eink holds its state once it’s programmed so you do need an initial program of the badge through USB-C, and then the NFC uses passive RF harvesting.
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by kaipereira 6mo ago
The total ended up being about $10/badge for 60 (5 for badge, 5 for eink), and we made the mistake of not ordering enough, so we ordered a couple more that were about $1 more expensive each. We bought all the badges from JLC and the pr
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Show HN: I made open source, zero power PCB hackathon badges(github.com)
158 points by kaipereira 6mo ago|18 comments
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by kaipereira 10mo ago
Oh wow, I've never actually heard about the Lemontron, I'll definitely take a look at it for inspiration!
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by kaipereira 10mo ago
I also did forget to mention, but this project is OSHWA certified too :D https://certification.oshwa.org/ca000068.html
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by kaipereira 10mo ago
Routing is honestly one of my favorite parts of making a PCB, there's something about the feeling of understanding exactly what each trace is doing that I find exhilarating. The problem with most AI powered tools is that they don'
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by kaipereira 10mo ago
I'm probably going to run Marlin just because it would be the first 3D printer I've actually made and I've heard it's more beginner friendly. I think Klipper also needs a dedicated host like a Pi which is a bit more over
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by kaipereira 10mo ago
4 layer boards actually make it easier instead of more advanced in my opinion. You can have a dedicated ground and power plane which makes routing much simpler, and the fields are much easier to predict. It's also just double the price
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by kaipereira 10mo ago
That's a really cool idea! I have a couple idea's on how I wanted to do it: - Belt printer fitted into a briefcase (the harbor freight case form factor would be good for that!) - Positron style - Maybe mess around with double four
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Show HN: I designed my own 3D printer motherboard(github.com)
127 points by kaipereira 10mo ago|40 comments
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by kaipereira 11mo ago
Hey guys, thanks for all the love :D The website went down because of the traffic and large images, so I've temporarily switched hosting, and it should stay up now (DNS propagation might take a bit though), but I'm going to get th
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How a devboard works (and how to make your own)(kaipereira.com)
96 points by kaipereira 11mo ago|34 comments
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I built a system to detect guns in schools and call 911(github.com)
8 points by kaipereira 2y ago|10 comments
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Show HN: I made a simple portfolio builder(designr.ink)
5 points by kaipereira 3y ago|0 comments