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Recent posts:
- New method for measuring lots of resistors using very few wires - part 3 - a simple measurement device
- Davids bile giveaway - Subscription? No, thanks.
- New method for measuring lots of resistors using very few wires - part 2 - Theory
- New method for measuring lots of resistors using very few wires - part 1 - Theory + intro
- GPIO abuse - sourcing and measuring at the same time
- Overdetermined system of linear equations
- Repair/teardown - FlexiScale weight and calculator scale
- L110 METRA Blansko resistance decade box
- Circuit Cellar publication - a new method for measuring resistors!
- HP 9000 Superdome utilities board ( A6475-60201 ; UGUY5-500 ) high res scan + guesswork
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Category Archives: 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
Posted in Resistance measurement method
Tagged .net, avr, pcb, publication, resistance, resistors, rnet
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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
Posted in Projects, Resistance measurement method
Tagged .net, article, avr, math, publication, resistance, rnet
4 Comments
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
Posted in Projects, Resistance measurement method
Tagged .net, article, avr, math, publication, resistance, rnet
2 Comments
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
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
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
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
Posted in Other, Projects
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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
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
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.