How can I make a DC to DC step down voltager regulator?
I want to make my own BEC (battery elimination circuit) for my RC helicopter, so that I don't have to spend $50 and buy one. I'm also very impatient when it coming to waiting for things to arrive in the mail. I have some basic electronic parts. I have some N-channel MOSFETs, Diodes, Resistors, OP-amps, and comparators, A butt load of Capacitors, My helicopters ESC(electronic speed controller) uses a 11.1v Lithium Polymer(LiPo) battery, but my RC receiver can only handle 6volts Maximum, at about 2-3Amps. I don't have any wheels, so I can't exactly run out to my nearest RadioShack to buy an LM317 voltage regulator. so I'm here to ask if anyone knokw how to build a [step dowm voltage regulator] from basic components?
Schematics ,and parts list would be appreciated. I have no idea how much current the LiPo battery is pushing, it exceeds the max range of my Multimeter which is 10Amps. fried couple of diodes, and blew the fuses it trying to measure the raw current. I need help please.