CFLi – The Magical Calculator
A simplified version of an already very easy to build circuit, for the use of energies produced by a compact fluorescent bulb (CFL).
Output under load is around 1.5V at 10uA with the aerial shown.
It’s a little small and doesn’t fold down along the back of the calculator, but works 🙂
13W and 23W CFL’s have been tried and both output similarly for powering the calculator.