Questions tagged [electronics]

Electronics deals with electrical circuits that involve active electrical components and associated passive interconnection technologies. Use this when asking about electronic devices, electronic design and use (or misuse) of some devices.

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78
votes
3answers
9k views

Does Electromagnetic Hypersensitivity (EHS) exist?

A recent article from Daily Mail cited the case of a woman claiming to be allergic to Wi-Fi, and that it could even kill her. This claim sounded ridiculous and absurd to me. Quoting parts of the exact ...
19
votes
2answers
910 views

Does reading off a self-luminous tablet impact the quality of sleep?

I've heard claimed many times that reading an iPad in bed makes for worse sleep quality than reading a book or a Kindle with a bedside lamp, Possible explanations I've heard are because of the ...
15
votes
1answer
21k views

Do ultrasonic cat repellents work?

Amazon sells roughly 355 different cat repellent products but judging by the consumer ratings, most of them don't actually work -- and even those that do, could be correlation rather than causation. ...
9
votes
2answers
10k views

Does a mobile phone send signals when it's off?

I've heard that mobile phones send signals to the tower even when the mobile goes off so your location can be detected. Is this possible?
18
votes
3answers
2k views

Can you harvest energy from radio transmissions?

This video gives instructions on building a circuit to harvest energy from radio waves in the air using some pretty straightforward circuitry. The creator has another video showing such a circuit ...
8
votes
1answer
634 views

Do electronics have a startup cost?

There is a long held belief with some electricians that turning on an electric device requires a "startup" cost, or an overhead in the amount of power needed for it to start functioning normally. I ...