Category Archives: Projects

My projects

Circuit Cellar publication – a new method for measuring resistors!

Dear readers, After lots of work, waiting and experimenting, I have completed a text that I have sent to Circuit Cellar and they have agreed to publish it. The article deals with a new measurement technique designed to measure lots … Continue reading

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Medical cable teardown

It’s time for something exotic – while at the ham radio get together at Holice in 2014 (great event! Go there.) I bought a cable. Not just any old cable, a really, really well made cable that must have originally … Continue reading

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The Coilgun

WARNING : Coilguns are very dangerous things! Don’t try anything unless you really know what your doing!!! Not only could you shoot someone, you also (more probable) might get electrocuted . The “experiments” described below are incredibly dangerous and should … Continue reading

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The simple 555 generator

The 555 generator is a super cheap solution to my problem. I needed to test a counter and was financially limited. The frequency didn’t have to be accurate, anything better than pushing a button to get impulses was OK. This … Continue reading

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The Elcheapo plasma ball from a Nixie tube!

WARNING: This article deals with high voltages, glass items and other fun things! The author is NOT responsible for any damage you do to yourself/others or whatever mischief you do. Do this at your own risk!!! I take no responsibility … Continue reading

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Magic eye

I recently acquired an old EM80 magic eye tube. It seemed cool just to play around with it and maybe even make a nice sound level indicator – the thing it was made to do.The filament was OK, so I … Continue reading

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B16S22 tube info

A guy on a forum I visit wanted data on this tube. Note: it’s only a pinout, and similar tubes to illustrate the functions and meanings of various pin names.

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The Nixie Power supply

WARNING: This device deals with high voltages. It is very unwise to build it unless you fully undestand it and are aware of the risks. I take no responsibility for whateever you may inflict upon yourself and/or others directly or … Continue reading

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Etching aluminum with Ferric Chloride

Ferric Chloride is a great substance! A lot of people have it, cause it is used to etch PCBs in DIY conditions. Aside from eating away copper, FeCl3 reacts with a lot of metals, but is harmless to most paints, … Continue reading

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The nixie clock V0

As a fan of retro electronics I found it very nice to have a nixie clock. So I’m building one. It will have a few Z560 nixies and will be driven by 2x HV5630 chips. Ofcourse, it will be AVR … Continue reading

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