Tag Archives: Electronics

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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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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Mains Frequency Display

I seem to be making a lot of displays lately. Here’s another one. Design Concept I’ve had this planned for a while. The concept is to display the frequency of the UK mains electricity supply. This is meant to be … Continue reading

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Shapes of Constant Width

Shapes of Constant Width I’d got my hands on a set of these shapes at a Festival of the Spoken Nerd (FOTSN) show in Nottingham. I’ve simplified Wikipedia’s explanation of what these things are: “A shape of constant width is … Continue reading

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Huge Seven Segment Display #4

LED Auto-Dimming This is the last post in a series of four on the days-accident-free counter I made for Nottingham Hackspace. You can read the other three here: Introduction, Counter Design, Enclosure Design The electronics for the counting of days and … Continue reading

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