FanGen – cap charge start up of external fan
Yes I probably need to get out more: The high voltage output of the coil circuit is rectified and passes through several capacitors in this demo. Firstly there is a 2200uF, then a 6800uF, then a 1F supercap. They all will charge with no load over time and I disconnect the supercap in such cases, because it only has a 5.5V rating. The FanGen is running from 6V from a wall adapter (measured after 2x FWBR’s and smoothing to smooth the thing out). With rotor not spun to start it up, it will wobble back and forth, triggering and retriggering the Hall sensor. This spikes the coil and produces HV, as seen in my last video. Not enough goes through to keep the 12V PC fan load running, so at each stop of part spin, the capacitors gain a little extra power. After some time, there is enough so that the fan will spin 🙂 The fan starts up at about 1:45