This is something of a square peg in a round hole type of problem. [Kiel Lydestad] has been riding a vintage Moped around. You know, a motorcycle that can be pedaled like a bike. He of program wishes to keep the thing looking stock, however likewise needs it to be completely functional. go into this light bulb replacement project. His brake light needed a new bulb, as well as he handled to make this 12V LED bulb work in the 6V socket.
An LED is a truly excellent option for this application since the Motobécane Moped uses a magneto generator to power the lights. It won’t pull much current, however it did requirement adjustment to run from half as much voltage. [Kiel] mentions that it may have been possible to fracture open the LED tower as well as change the present limiting circuit inside, however he felt it was easier to just add this voltage doubling circuit. He assembled the elements in a method that still enables them to in shape in the metal base of the bulb.