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What inconsequential or surprisingly good thing can I get from Aliexpress?

Im curious as I usually use the site very occasionally to get certain electronic parts or order from PCBway like I just picked up some cheap but infinitely better than stock gps antennas for my LoRa T beams and im about to get a set of also still cheap but much better than stock 915mhz antennas but i kinda wanna throw some other...

Is “harvesting” small amounts of electricity a fools errand?

Serious question from a beginner in electronics. For reasons I do not fully understand, I have become fixated on the idea of collecting small amounts of electricity from “interesting” sources. I don’t mean “free energy”, instead, I mean things like extracting a few mV from being so close to a AM radio tower using two...

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