Primes

Primes

The reminders about Amazon Prime day got me thinking about Prime Numbers. Whilst I was coding a power efficient “blink” for a new 4Tronix board I joked that it was not calculating primes. But then I thought, “why not?” I

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Cutting stock

Cutting stock

For my current welding project, a series of security grills for a mate’s shed I need to cut a select of bars to length. I needed 2 x 479mm and 2 x 1199mm bars.The stock I had left over from

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Metal solids of constant width

Metal solids of constant width

I’ve mentioned before when I was looking at measuring tools, John Bryant and Chris Sangwin and the book “how round is your circle”. One of the interesting items from the book was a selection of metal objects that had constant

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