Category Archives: Miscellany

All sorts of stuff, ranging from my insane rants on the proper indenting of stuff to

Overdetermined system of linear equations

Introduction This text is a quick post that should give a quick explanation on (overdetermined) systems of linear equations, particularly their matrix form. It is for an upcoming article that deals quite a lot with these systems. Warning: Please note … Continue reading

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Repair/teardown – FlexiScale weight and calculator scale

I love going to the flea market – you find all sorts of fun stuff, bargains, trash and the occasional treasure that is being sold for next to nothing. This posts fits into the ‘fun stuff’ area – while at … Continue reading

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L110 METRA Blansko resistance decade box

Recently I got a L110 resistance decade box made by METRA Blansko, in former Czechoslovakia. Unfortunately something was rattling inside, so I had a quick look inside to remove the offending part – it was a small metal nut that … Continue reading

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HP 9000 Superdome utilities board ( A6475-60201 ; UGUY5-500 ) high res scan + guesswork

While on a buying frenzy at a local radioamatuer gettogether (Holice 2014) I saw an interesting looking PCB – apparently taken from some kind of older HP system, it had some very nice oscillators (500, 525, 100, 126 MHz), some … Continue reading

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Words of Embedded Design Wisdom

On this page I would like to publish some thoughts, sayings, rules of thumbs and wise things that I’ve come to observe during my few years of experience in the field of embedded systems design (and life in general). If … Continue reading

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Perspective – why does it take so long to compile FPGA projects

I recently started (again) to poke into FPGA devices. I remembered the most annoying thing about that development – it took so damn long to compile. But, when one takes into account how much the compiler (implementer, mapper, optimizer, whatever) … 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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Davids bile giveaway – Images in PDFs or “Maximum compression leads to depression”

First look at this schematic: Now, this is the schematic from a of an evkit for one of the devices of an unnamed company. You’ll note that they used a resistor of a value of… well… 1k? 10? Ah, of … Continue reading

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Achievement unlocked – I’m an Engineer!

After many years I have finally finished my studies at FEI (the Faculty of Electronics and Informatics in Bratislava) and am now an official EE (Ing. title in Slovakia)! I would like to thank my friends, colleagues, teachers and many … Continue reading

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Datentechnik MS2-TD serial data generator teardown

This gallery contains 77 photos.

While going through random electronics on a local flea-market (on the Inter Stadium in Bratislava, 98+% of the items there are of no interest, but the occasional treasure can be found, beware of pickpockets) I found this little device – … Continue reading

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