A white 5mm LED. I think it's 2000mcd, it came out of my junk box.
A red 3mm LED - high brightness. Optional. Lights when the capacitor is being charged by the dynamo.
A 1 Farad, 5.5 Volt capacitor.
A hand held crank dynamo. I got it at Jaycar electronics. I think the motor/gearbox from a simple toy car would probably work just as well.
It puts out about 5 Volts at top speed, so I thought it was a good idea to use a comparable capacitor.
Lots of patience. And coffee. And ciggies.
The switch stops the capacitor from discharging straight into the white LED, that would make it a hand-cranked light, and not a wind up, to use hands free, torch.
Step 1: The dynamo crank
Step 2: The little red LED
Step 3: The little red LED who could...
Step 4: Let there be light!
Not bad for a cheap white LED, around 2000mcd I think.
Step 5: The schematic
Sorry about the mistake, my bad.
Step 6: The dynamo crank unit
First, the unit side on.
Step 7: The dynamo crank unit, side on
The dynamo crank works in reverse, turning the drive shaft and the motor, and supplying power through the solder tabs, to the circuit.