A Beginner's Two-Component Crystal-Style Wi-Fi Detector

This 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.

Can this be used to detect radiation escaping a microwave oven?

A friend of mine has a microwave that noticeably degrades his wifi when it is in use.

So the question is how to do similar for 5ghz?

curious, 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?

Remember those little LED keychains for your "mobile phone" that would magically light up when taking/making calls and sending/receiving texts?

>"Using just two components — a

high-speed [1N5711] Schottky diode

and an LED — you can build a tiny “crystal detector” that responds to

2.4 GHz

Wi-Fi, Bluetooth, and even microwave..."

That is interesting!

I never knew that a Schottky diode could rectify at 2.4 GHz -- that's pretty darn impressive!

I made hundreds of these. Never worked