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Train Surgery
This is a fun little battery-powered Christmas tree train set… but out of the box it has two “features”:
Jan 7
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Chris Greening
2
1
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ESP32 Rainbow QA - A tale of three boards
We’ve now shipped a few hundred ESP32 Rainbow boards; most of the boards have worked perfectly - but there are always a few that don’t make it.
Jan 2
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Chris Greening
1
1
That was 2025!
Another year, another collection of projects, mishaps, and late-night debugging sessions.
Dec 31, 2025
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Chris Greening
1
1
Stop Using printf() - Debug ESP32 the Right Way
Printf and GPIO pin waggling - you might think that's the only option for debugging your ESP32 projects...
Dec 18, 2025
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Chris Greening
2
ESP32-S3 Dev Board Assembly
And it blinks...
Nov 13, 2025
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Chris Greening
1
I Built a 27V PCB to Fix This $3 Display...
Was it really worth it?
Nov 7, 2025
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Chris Greening
1
I made a 10¢ MCU Talk
TLDR: Yes, you can fit about 7 seconds of audio into 16K of flash and still have room for code. And you can even play LPC encoded audio on a 10¢ MCU.
Oct 29, 2025
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Chris Greening
1
Brain Surgery
I got one of these silly Halloween toys - they are kind of fun - but it feels like we can make them even more fun/annoying...
Oct 24, 2025
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Chris Greening
1
10 Cent Music Machine
These super cheap MCUs have been around for a while - let's see if we can get some tunes out of the cheapest one!
Oct 17, 2025
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Chris Greening
1
PDM Microphone Mystery
There's no LR pin in the code - what are we supposed to do with it?
Oct 10, 2025
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Chris Greening
1
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