29 February 2024

VXI bus, Tektronix and more

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If you could publish just once a month, would you miss the opportunity to post on the unique day of a leap year? Here's my February 2024...
30 January 2024

Aging carbon resistors

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4k7 ohm 5%, right? Here's a post to mark January 2024. I've been doing very little in the lab because of work, flu and mostly cold t...
26 December 2023

Luce di cortesia per il baule dell'auto

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Arriva l'auto nuova. E' dotata di sensori di parcheggio, retrocamera, frenata assistita, sensori di collisione, sensore di pioggia, ...
23 December 2023

Battery of Braun 5514 shaver

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I have a cordless hair&beard "styling kit" from Braun, model 5514, that doesn't hold the charge anymore. I use my solderin...
09 December 2023

High-Voltage High-Z DIY probe

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As a self-assignment for troubleshooting the Hameg oscilloscope, I needed to measure kiloVolts. The world agrees that you need to arrange a...
05 December 2023

Troubleshooting an Hameg HM203-6 oscilloscope - no trace

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R ight after fixing the high voltage being too high (-2500V vs -1900V) on the Hameg HM203-6 oscilloscope, the trace disappeared. Note that I...
30 November 2023

Troubleshooting an Hameg HM203-6 oscilloscope - high voltage on CRT

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I used the Hameg HM203-6 scope to test the Tennis-for-Two emulator I quickly built in November 2023. I also carried it to the exhibition ven...
29 November 2023

Tennis for Two emulator

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The secret project that went live on November 17th, 2023, was an emulator of the Tennis-for-Two game from 1958. It has been built for MuPIn...