Technology,strategy,flying... For life and politics in France (and in french): @chtronche_fr
Joined July 2009
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charmtimetracker crashes with Gnome Shell on Ubuntu 22 (is it Wayland ?)
With metacity ("flashback") / X, works like... a charm!
Sir Clive Sinclair invented the ZX Spectrum. ow.ly/K3af50GbpM6
Silly, but I happen to like my own DHT22 Mbed OS library.
github.com/chtronche/ya-dht2…
Never use sprintf, use snprintf instead,especially in embedded systems...
The non-believers will go to hell, which actually is the place where you spend your week-end debugging erratic seemingly paranormal behaviors...
To tell the whole story, a sprintf overrunning a buffer on the stack (local variable) was altering the virtual function table of the object (this is C++ on AVR), thus crashing at the very point of the function call. Paranormal, I tell you.
As a lesson, although the crash occurred in a rather experimental library that had suffered bugs in the past, I had been using it for several years now without a glitch. So it had to be my code. Once I was in that state of mind, spotting the problem was rather quick.
Christophe Tronche retweeted
Taxe municipale sur les mâts et les pylônes radioamateurs-france.fr/taxe…
9 of them connected in series (~11F, 24V) fitted with 2 10 ohms 20W resistors for current limitation.
Power circuitry is like no other!
Amazing @sparkfun voltmeter (or at least voltage indicator), useful for demos, designing your multi-stage power circuitry, and anything you can imagine. Less than 2 €. Absolutely amazing.
Concrete voltage divider...
(NB:the voltage indicator is sold for 2.5-30V, so it's within the specs). youtu.be/eCdBPHONNTk