Simple micro:bit video out

I love making little computers and getting video out from Arduinos and even micro:bits – IchiconQuest is a lovely self-contained, if eccentric, computer you can make with a micro:bit that has video out.

I stumbled upon the video above remarkably late – it’s just a simple demo by Kevin Moonlight to generate text on an NTSC composite video output on a TV using just a V1 micro:bit and 1 or 2 resistors. I had a go at re-making it, and succeeded!

How to wire up video out from a micro:bit

I’m grateful to @wifisheep for telling me that to make it work better, you should also put a 1K resistor on the red line between the phono and the clip. I had all sorts of weird earth issues without adding that – but still, quite impressive with two resistors.

screenshot of text from a micro:bit

Because very, very accurate timing is so crucial when generating video, the code for this is in C++, not in MakeCode or Python.

You can find the source code and HEX files you can flash direct on to a V1 micro:bit to try this for yourself on my GitHub: https://github.com/blogmywiki/microbit-video

I even made my own font!

wide font on a micro:bit

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