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

145 points by jensgk

by pavlus

0 subcomment

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.

by jqpabc123

8 subcomments

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.

by ifh-hn

3 subcomments

by peter_d_sherman

0 subcomment

by didntknowyou

4 subcomments

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?

by wowczarek

2 subcomments

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

by thenthenthen

1 subcomments