RE: LEGO Qi - Update

e14 Contributor — Tue, 30 Apr 2013 17:25:20 GMT

While not a Qi solution, you could also use 9V track to recharge using metal wheels, axels, and use a brush to pull power for charging. Incorporate a voltage detection and switching circuit to draw additional power from the battery when changing between DCC zones and going up slopes/around corners to create a more consistant voltage output and your train won't slow, nor will the lights dim when the motor is put under heavy load.