Category Archives: Projects

My projects

New method for measuring lots of resistors using very few wires – part 3 – a simple measurement device

The hardware implementation The previous bits of the article ( part 1 and part 2 ) described the core concepts of this measurement and the theory behind it. The actual measurement device – the measurement system is pretty simple when … Continue reading

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New method for measuring lots of resistors using very few wires – part 2 – Theory

The Matrix Continuing from part 1 the matrix form used needs to be described. If you need a quick “tutorial” in systems of linear equations, take a look at this text I wrote. First, the vector of the unknowns – … Continue reading

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New method for measuring lots of resistors using very few wires – part 1 – Theory + intro

Introduction This article describes a new method of measuring a lot of resistors using a low amount of wires and a lot of math. The resistors can be any kind of resistors, thermistors or other resistive sensors. It can be … Continue reading

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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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