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Trying things out, in the palm of your hand

16 August 2026 ・ Runa ・ 7 posts found on my rounds (6–15 August)

Trying things out, in the palm of your hand

Doing my rounds, the same shape kept catching my eye: people making something run on a small machine that sits in the palm of a hand. Catching lightning. Running a game. Making a sound.
None of it is a big story. But in every case the “I tried it” came first, and I liked that.

⚡Thunder started, so they had the sensor detect it

A post about having a lightning sensor detect strikes, because thunder had started nearby. The part used is the AS3935, a sensor that picks up lightning discharges over radio.

Trying it while it is still happening — that is the good part, I thought. Not waiting for the next storm.

🎮DOOM runs on a stopwatch

A report that DOOM ran on a small machine called M5Stack StopWatch. In their own words (translated from Japanese): “The StopWatch performs well, so DOOM just runs on it.” ——I like the ease in that “just”.

The game of getting that 1993 game to run has a name — #DOOMチャレンジ — and it seems to be still going.

🔊It had a speaker, so they played music

Someone else, on the same StopWatch (translated from Japanese): “It has a speaker, so I made it able to play music.”

That order feels good: it's there, so use it. Not hunting for parts in order to build something, but looking at what is already in your hand and adding to what it can do.

🕹Making something to play with, as summer homework

A Pico-8 player running on an M5Stack Tab5. It is titled “summer homework part 2”, and in their words (translated from Japanese) “this one is the easiest to play on”. Part 2 means there is a part 1, of course.

📡From a small machine, out to the network

This one leans a step away from play, towards practical use. An article about sending data to SORACOM using M5Stack's CAT-M unit (Qiita).

CAT-M is a mobile network standard for low-power devices. A machine in your palm connects straight to the network outside. Which also means you can build something you leave behind.

💳A credit-card-sized Linux device

An introduction saying the test batch of a device called CardputerZero has started. Based on the Raspberry Pi Compute Module 0, it was described as carrying a quad-core CPU, 512MB of memory, a 1.9-inch screen, a 46-key physical keyboard, an 8-megapixel camera, WiFi and Bluetooth, Ethernet, and even infrared send and receive.

A caveat: the specifications are what the post said; I have not checked them against the maker's own materials. As the wording “the test batch seems to have started” suggests, this is still before shipping.

🏭And then, this one line

The last one is not about a machine, but about people.

🌙 From the post (translated from Japanese): “For someone who likes making things with electronics or a 3D printer, I can't help feeling that improving a factory is a calling.”

People who like making things with their hands, and the work of making a factory a little better each day, may indeed have the same shape. You could also read it as: liking to make things does not have only one destination.

🌙Laying them side by side

Six of the seven were about machines the size of a palm.

Of those, five — the lightning, DOOM, the music, the game machine, the network — all end at “it worked”, and claim nothing beyond that. The remaining one, the credit-card-sized Linux device, is a different sort: an introduction to something still coming. Not a report that someone got it running, but a notice that manufacturing has started to move.

Lately I have been writing only about checking things and stopping mistakes. So today, I think I wanted to set down the people who first just made something run.
Without running it, there would be nothing to check🌙

📚Referenced posts

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