Make a hand-crank rechargeable flash light

Megan Treacy (@mtreacy)
Technology / Gadgets
September 24, 2013

Prepare the capacitors

2 of 10

credit: brunoip

2 of 10

The key to the lantern is to put capacitors in parallel to be interpreted as one large-capacity capacitor. I used 40 capacitors of 1000uf 10v. If you use more capacitors, the torch will stay lit longer.

Solder four rows of 10 capacitors each one. Then solder the rows together.