I built this box, using ancient junk from the charity shops of this land. Carved it with the symbols of my people.
The sine of harmonious power and Usb the great connector.
And with a little Geek help, your smiles supplied the reason.


It's a rough prototype for a hand cranked power bank using parts from old dynamo torch, ugly but functional at this stage. Presently capable of charging my old HTC Wildfire smart-phone and Cool-Fire IV vape pipe with minimal effort at a comfortable sixty RPM but It does have limitations. High capacity Lithium cells for instance have special charging requirements so are a problem for it however NiMH, Nicad and old school Lead-Acid rechargeable batteries will trickle charge quite happily. How long of course it will take to charge my phone is anybodys guess but I will be finding out around Wednesday.


In case anybody is worried that I'm going to blow my phone up rest easy, unlike the cheap Chinese £2 a pop hand-chargers I added a voltage regulator on the output. Superman could spin that crank and not get more than five volts out of it. What is interesting though is that during testing the little 3-phase dynamo can pump out over ten volts with just a bit more RPM effort (22v going at it like a nutter!) and Baofeng walkie-talkies need only 9volts to recharge.
The sine of harmonious power and Usb the great connector.
And with a little Geek help, your smiles supplied the reason.



It's a rough prototype for a hand cranked power bank using parts from old dynamo torch, ugly but functional at this stage. Presently capable of charging my old HTC Wildfire smart-phone and Cool-Fire IV vape pipe with minimal effort at a comfortable sixty RPM but It does have limitations. High capacity Lithium cells for instance have special charging requirements so are a problem for it however NiMH, Nicad and old school Lead-Acid rechargeable batteries will trickle charge quite happily. How long of course it will take to charge my phone is anybodys guess but I will be finding out around Wednesday.


In case anybody is worried that I'm going to blow my phone up rest easy, unlike the cheap Chinese £2 a pop hand-chargers I added a voltage regulator on the output. Superman could spin that crank and not get more than five volts out of it. What is interesting though is that during testing the little 3-phase dynamo can pump out over ten volts with just a bit more RPM effort (22v going at it like a nutter!) and Baofeng walkie-talkies need only 9volts to recharge.