Remember those little LED keychains for your "mobile phone" that would magically light up when taking/making calls and sending/receiving texts?
A Beginner's Two-Component Crystal-Style Wi-Fi Detector
21–30 of 45 posts
Re: A Beginner's Two-Component Crystal-Style Wi-Fi Detector
#22curious, so if you build a "wall" of these, it would use up the wiress energy in the air so will absorb the excess waves around you?
Depends if you are standing infront or behind the wall ;)
Re: A Beginner's Two-Component Crystal-Style Wi-Fi Detector
#23Remember those little LED keychains for your "mobile phone" that would magically light up when taking/making calls and sending/receiving texts?
These stopped working since 2G, since it uses radically less power. Altho I did recall seeing some fancy phone cases with blinkies on 3G… never could replicate it sadly. I guess with a lot of joule thief/stepup circuits it might work…
Re: A Beginner's Two-Component Crystal-Style Wi-Fi Detector
#24Earlier quoted context omitted.
Thanks. Appreciate the reply. From a brief look that might detect 2.4ghz too? Really wish I was clever enough to do electronics!
Depends on the length of the antenna. I'd bet you can get a length close enough to be a quarter-wave 5Ghz and 1/2-wave 2.4ghz antenna. Just buy a 2.4/5Ghz combo antenna and slap the diodes across it.
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Re: A Beginner's Two-Component Crystal-Style Wi-Fi Detector
#25curious, so if you build a "wall" of these, it would use up the wiress energy in the air so will absorb the excess waves around you?
Of course. Ambient radiation is a viable power source for distributed sensor networks and similar low-power stuff.
Re: A Beginner's Two-Component Crystal-Style Wi-Fi Detector
#26Earlier quoted context omitted.
Nothing. obviously the last bit stands for hacker news. Just randomly pressed letters.
Okay, I was just curious because you were saying nice things about HN and there's a popular abbreviation IFL for I Fucking Love, so I had to wonder!
Oh, I didn't know that and searching for ifh abbreviation on urban dictionary brings back what I think your curious about. Unfortunate coincidence. All my usernames are random strings. Good to know though.
Re: A Beginner's Two-Component Crystal-Style Wi-Fi Detector
#27This is how FPV jammers are often field-checked in Russo-Ukrainian war. It doesn't test frequencies or spectrum quality, but is a useful indicator, that jammer is actually emitting (has power and is turned on), so you can be sure, that if it's up to spec and covers frequently used frequencies at your location - it actually tries to do it's job, instead of being a costly paperweight.
Re: A Beginner's Two-Component Crystal-Style Wi-Fi Detector
#28I made hundreds of these. Never worked
Hundreds? Really? I can see making two or three before giving up, but to build hundreds..
Re: A Beginner's Two-Component Crystal-Style Wi-Fi Detector
#29Remember those little LED keychains for your "mobile phone" that would magically light up when taking/making calls and sending/receiving texts?
I don't remember that, but I do remember my speakers buzzing just before a call or text came through.
Re: A Beginner's Two-Component Crystal-Style Wi-Fi Detector
#30Earlier quoted context omitted.
For devices where connectivity is more important, switch them from 2.4Ghz to 5Ghz to avoid microwave interference.
Other than phones and laptops (i.e. "real computers"), most devices only support 2.4, no? I can't recall the last time I set up a non-computer device that didn't say "make sure you're using a 2.4GHz network"... (I imagine it's a much lower cost to only handle 2.4GHz?)
I was curious so checked my network. I've got 21 things on 2.4 and 16 things on 5.
The 16 are 4 computers (2 Macs, a Surface Pro 4, and an RPi 4), 3 mobile devices (iPhone, iPad, Apple Watch), 3 media devices (Fire TV, Nintendo Switch, and Kindle Oasis), one smart plug, a Brother printer, 3 smart speakers (Google Home Mini, two Echos), and an EV charger.