Mike Bell
@rebelmike.bsky.social
430 followers 300 following 400 posts
Electronics tinkerer, narrowboater, puzzle hunter, board gamer and occasional geocacher. Also on fedi @[email protected]
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Reposted by Mike Bell
Landowners/homeowners along the “Bristol Avon” or tributary/waterway (like the K&A canal): If you’ve got any invasive species (Knotweed, Bamboo, Balsam, Rhododendron, Cherry Laurel, Giant Hogweed/Rhubarb) Let @protect.earth know and we’ll remove it for voluntary donations. protect.earth/contact
Contact — Protect Earth
protect.earth
In honor of spooky month, share a 4 word horror story that only someone in your profession would understand

“Under specific microarchitectural conditions”
I'll do it in three:

"possible race condition"
In honor of spooky month, share a 4 word horror story that only someone in your profession would understand

I'll go first: Six page commercial lease.
Thinking of getting one of these for on the go hacking. Any ideas how well installing Debian on it would go?

www.lenovo.com/gb/en/p/lapt...
www.lenovo.com
That’s true, it definitely doesn’t have the problem of being too bright 😆
Spot the flaw in the plan...
A small portion of schematic showing two LEDs with resistors to ground.  The LEDs direction is away from ground...
I’m planning to demo running a few of the winners live, running on FPGA.

I’ll be using my TinyQV Micropython port. Wish me luck!
We’re announcing the winners of the Tiny Tapeout RISC-V peripheral competition tomorrow!
Reposted by Mike Bell
We got ‘em!

Raspberry Pi 500+ keyboard connected to my MacBook 🤣
A Pi 500+ keyboard connected via a flat flex and USB type-C breakouts (wired together with DuPont “jumper jerky” wires) to a regular USB cable and - in turn - a Mac. The macOS keyboard setup assistant asking me to set up my “Raspberry Pi Ltd” device.
Reposted by Mike Bell
We just packed 237 of your projects into our most packed ASIC to date and submitted it for manufacture. Let’s take a look inside…
floorplan of the latest TT ASIC multi project chip
Reposted by Mike Bell
In other news, it fukken WORKS and I've successfully made a tiny stained glass window for my beetle's abdomen. 😍
Well that escalated quickly
A small PCB designed to go on a Pico or similar boars, with a microSD socket.  There's a FET for controlling the power to the socket.
Reposted by Mike Bell
It was awesome to be on @chrisgammell.bsky.social 's Amp Hour podcast again. Find out more about my latest endeavor to make custom silicon manufacturing accessible and follow @wafer.space and bookmark wafer.space to keep up to date!
What happens when one of the main providers that enables #opensource #silicon to thrive...shuts down? Companies like @mith.ro's new wafer.space jump in and offer an even more compelling option. $7K for 1000 chips on the GlobalFoundries GF180MCU process. Learn more:

theamphour.com/703-building...
Possibly?

Stick it in a Presto, have the RP2350 just host the framebuffer and drive the display. Risc-V core on this runs doom. 140kB RAM would make it a challenge but with the framebuffer external it's probably doable.
Of course making a little dev board for it with an RP2 to program and power cycle it would not be hard...
Not that I actually have much idea what to do with it - I think a Presto coprocessor was the idea I had, but not sure what an ICE40 can do that an RP2350 can’t…
Well, it blinks.

The whole you have to unplug it from your computer and plug it into an SD card slot that doesn’t act as an SD host to run the design thing may get old rather quickly.
Just received a rather tiny dev board. USB-C connector for scale.
A microSD card sized FPGA board. The text says C0-microSD
I should get one of these for our boat, to replace the Cello TV that I’m using as a monitor there.

Given it can run off a Pi’s USB port it must be significantly more power efficient too.
Let’s see how these test ducks do
Four make mallard ducks on some grass
Reposted by Mike Bell
I got inspired at orconf, so now play.spade-lang.org supports a full in-browser flow for submitting to tinytapeout.com/

Still experimental, so if you try it and run into any issues, let me know :)