21–26 of 26 posts
For a while I had a very overpriced phone case from moeco that lit up when cell service was being used - https://www.moeco.jp.net/ - it came with a big warning not to use wireless charging with it (due to instead heating the case). Sadly, I wouldn't get one nowadays, I love wireless charging too much.
lol screw wireless charging, if I had the $$ for it and shipping and taxes wouldn’t be so darn expensive it’d be a nobrainer for me
Back in the days of 2G the pre-wake-up pulses, aside from causing massive FM/AM interference like demented Morse code, would light up tuned antenna spark gaps on stickers for your Nokia phone. In Japan they sold cute phone tokens which had glowing eyes. Energy harvesting the same way Theremin did for his passive wall bug.
Tuned spark gaps? Or just an antenna hooked up to a pair of back to back LEDs? Just recently I saw something about light-up fake fingernails that would blink when you got a 2G phone call.
> That last one consumed an hour of diagnostic time and involved using time-domain reflectometry (with a 20 ps rise-time pulser and 20 GHz scope) to locate the fault to within a region of a couple millimeters on one trace. How does one even obtain the skills, much less the equipment to run such precision?!
A good EE degree with some RF specific course parts will teach you the concept. The scope .. well, you kinda have to borrow it from your employer as they're in the $10k range at that frequency.
Apologies if this goes against the hacker spirit, but do you know where I can buy a similar thing? In Europe?
Earlier quoted context omitted.
A good EE degree with some RF specific course parts will teach you the concept. The scope .. well, you kinda have to borrow it from your employer as they're in the $10k range at that frequency.
They also mention having access to a source-meter, which is not cheap either. I wouldn't mind spending some time in that lab!
For a while I had a very overpriced phone case from moeco that lit up when cell service was being used - https://www.moeco.jp.net/ - it came with a big warning not to use wireless charging with it (due to instead heating the case). Sadly, I wouldn't get one nowadays, I love wireless charging too much.
lol screw wireless charging, if I had the $$ for it and shipping and taxes wouldn’t be so darn expensive it’d be a nobrainer for me