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Ladyada and fam' moved to Brooklyn to be close to Adafruit's new Industry City factory, which means we now have a deck! It's a multi-purpose baby art studio / engineering workstation / gremlin nursery. Yes, that's EAGLECAD, and yes - we've been moving to KiCad.
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PikaPC Phase 2
I'm moving forward into the second phase of my PowerPC homebrew computer project, PikaPC — spinning up PCBs to replace the wire-wrap prototype. I've spent the past week dividing up the schematic into manageable cards using my new bus spec, and laying out 10x10cm PCBs for each section. I have five cards planned to start with: a host card, a 72-pin SIMM card, a card for the S3 ViRGE, an power supply & bus termination card, and a card for an 8042 PS/2 keyboard/mouse controller.
I've completed all these PCB designs just in time for Spring Festival to shut down production & shipping, so I expect it will be quite some time before I receive them. In the meantime, I think I might try to implement my new bus on the wire-wrap prototype so I can test the new cards on a known-good system.
finally put my mini computer thingy project on git. idk what to call it tho
little SAM9x75 based portable computer for low spec computing with modern software
sidenote. I absolutely love the SAM9x75 SoC so far, its insanely simple and cheap yet quite capable in terms of IO, without going overboard on processing power. Perfect for making a low-spec computer.
Also has some really neat features like XIP which will save a lot on RAM usage. and they provide source code for pretty much everything and documentation is amazing.
only issue is that the CPU is an 800MHz ARM9 core with 64MB of onboard RAM but that's not that bad for a simple desktop with most everything running with XIP. Plus, I can easily extend it. Which I might do later on idk.
actually now that I think of it I think I should keep a space for an extra QSPI RAM chip if I decide I want to use it in the future. but idk if that'll play nice with XIP cuz it uses the same memory area. I might also be able to use a DDR2 chip, but I'm not sure because of various reasons. also it would be hard to route
I designed a VIC-20 dual serial cartridge because I wanted to.
Nevermind the other stuff I'm supposed to be working on.
So, the esp32c3 from seeed has these battery pads on the underside that allows you to use the integrated charge controller, which is nice for a cheap devboard.
Now, I don't have a hotplate, and the rest of it is castellated so it's easy to do by hand. My question is: Is this. Allowed.
just put some big vias through the board and flood them with solder from the underside. Is this stupid or will it work.
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I've been working on a game controller. I exported the .step files for the pcb from kicad and converted that into a .stl and I'm using that for a test fit. I have two full sized arcade joystick microswitches for the shoulder buttons and I'm using kailh choc keyboard switches for the dpad and face buttons.
it's unlikely I'll keep you all up to date on all the changes, but if you're interested you can check out my mastodon account!
Zolatron 64 6502 homebrew - moving up to real hardware
Zolatron 64 #6502 #homebrew - moving up to real hardware with #KiCad PCB designs.
The rat’s nest approach. You can only go so far with a breadboard. Those things are great for quick and dirty prototypes and experimentation. But there comes a point when a breadboard is an unhealthy basis for a project. And yes, I’m aware that many people have followed Ben Eater‘s lead in building 8-bit processors and 6502-based computers on breadboards. I include myself among them. But Ben’s an…
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44/100 Days of Productivity
🐿 I did next lesson from the PCB design course (the picture above is a 3D visualization of my PCB)
🐿 Continued taking notes from the safety instructions
🎧 Kwiat Jabłoni - Niemożliwe
