Wind-Up Wireless Electricity

After struggling with dodgy meter readings for good solid power input figures within previous experiments, I decided to ditch the use of batteries altogether ! A stepper motor is used, 2 wires of which run to an LED to show the power delivery and rectify the output, then across a capacitor to store the energy. The capacitor connects to the very simple wireless circuit. The circuit uses a ‘tank’ section, to cut down on the power drawn from the capacitor and will deliver many minutes of output from about 20 wind up turns of the motor shaft. The motor shaft can be turned in either direction, or even rocked left and right and still work. Ideally a turning handle would be fitted to the motor shaft. In case of difficulty reading the schematic. The pancake is wound as a conventional bifilar Tesla pancake. The wire is from an old modem cable/telephone 2 core wire. Receiving coils can be single filar, and of a different size to the transmitting coil. Capacitor can be anything, the bigger the better and the longer the circuit will run, but the longer it may take to charge up. Transistor can be any good high hFE signal transistor, such as the S9014, C1815, 2N2222 or MPSA06. Resistor here is a 470K, higher resistance will increase the run time, but lower the output brightness, same for the 0.1uF (104 marked) ceramic capacitor. The stepper motors seen came from old PC printers. All components used are salvaged parts from junker stuff 🙂 The battery charging can take a while, but does

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