arduino

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VFD Tube Experiments

tl;dr: bringing old IVL2-7/5 tubes to life again ..

Vacuum flourescent displays are a beautiful piece of retro technology. Noritake Itron and a few others still build them as dot-matrix or full graphic displays. But the technology dates back to the 70’s and you can find some surplus units available on eBay.

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Flash Arduino without a Bootloader from a Raspberry Pi

tl;dr: use the GPIO pins of a Raspberry Pi to flash Arduino boards without a bootloader

To keep things short: I’ve had an Anet A8 3D printer for a while now and wanted to flash an updated version of its Marlin firmware. For some reason however, the bootloader was broken. So I couldn’t flash it with avrdude by simply using a USB cable. For this case you can find lots of tutorials on how to flash Arduino boards with a second Arduino. I didn’t have a second Arduino at the time though … so why not just bit-bang it from a Raspberry Pi instead?

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