spatial
Senior Member
Posts: 2,195
Likes: 1,509
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Post by spatial on Apr 19, 2021 22:22:40 GMT 10
Only for emergencies and has, solar charger
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malewithatail
VIP Member
Posts: 3,292
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Location: Northern Rivers NSW
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Post by malewithatail on Apr 20, 2021 8:00:24 GMT 10
I have found that all the hand cranked radios I've seen/used have plastic gears. Some don't seem to be particularly form stable and warp over time. It's called dimensional stability. It's not that hard to make your own hand rank generator of much better quality than any brought one. U start off with an old permanent magnet motor some kind, an old 3 phase DC motorfrom a dead electronic drill will work. Attach some form.of handle to it and turn away. A super capacitor will store enough energy for a radio or led light. It's not hard to rig up a falling weight of rocks or bricks to use gravity as the energy source. In fact some commercial products came out that did the same thing. I seem to remember the plastic gears stripped easily. Such a device is on the list to make, after I make the gasifier unit. I already made a small unit some years ago using an old muffin type flat fan center and a knob, charging a 1 f supercap and running a red high intensity led. It works Ok, but the knob really needs a good spin to charge enough to run the light for more than 30 seconds or so.
Gravity is a myth, the Earth sucks.
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