Category Archives: Electronics

Concerning how to move electrons through silicon and copper in order to do cool stuff.

Some nodeMCU connection troubles

For a work project, I’m using a nodeMCU, which is an ESP8266 module flashed with a Lua interpreter (and put on a nice PCB with USB serial and stuff). By the way, ESPlorer is a really nice interface to the nodeMCU. I started by following … Continue reading

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Tsunami Signal Generator “Case”

I recently got a Tsunami signal generator from Arachnid Labs. I could have got a proper case for it, but instead I thought I’d make my own. I really like making simple lasercut cases, so I threw together a “wave-like” design, cut … Continue reading

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Adding graphics to KiCad PCBs

The wrong way to use Bitmap2Component There are many, many blogposts and videos about how to convert a bitmap image into a KiCad module for putting on a PCB. Here are a two: http://www.re-innovation.co.uk/web12/index.php/en/blog-75/230-adding-logo-to-kicad None of them worked for me. … Continue reading

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Breakin Board for Just Add Sharks

Those who take an interest in such things will know that Just Add Sharks have released a new breakin board for replacing “standard” Leetro controllers with your own. I produced the board to a design given to me by Martin … Continue reading

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Renaming things quickly in Eagle

I use Eagle for my PCB design and I generally find it to be a nice piece of software. One annoyance that I came across recently was the seemingly hard task of doing a “bulk rename” of components on a schematic. … Continue reading

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Stroboscope

Introduction For a Nottingham Hackspace project, I was asked if I could measure the RPM of a motor. “Sure!”, I said. What was really needed was quickly bodging together a beam-break circuit and connecting it to an oscilloscope. This would … Continue reading

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Cheap-ass Logic Probe in 15 minutes

I had a sudden need for a logic probe. Here’s how to build one in 15 minutes. Get an Element 14 pen. IT MUST BE FROM ELEMENT 14. No other normal biro will work. Cut off the clicker end with … Continue reading

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