How to get a 9V high ampere supply from a 12v storage cell ?
nikhilkerala asked:
I have a remote controlled car that runs on a rechargable sealed 12v battery. But the car has no speed controls. Only forward, reverse, left and right… The car’s standard speed is too high to be controlled on the remote without bumping into walls and objects. But I noticed a slow down on the car when battery charge reaches like 25%. So I tried to drop some voltage by connecting five 1N4001 general purpose silicon diodes in series to the battery…. The speed was now perfect… But after running the car for like 5 minutes, I opened the battery enclosure to see the plastic body of the car in contact with the diode, started melting due to the high temperature produced due to the high current thru the diodes…..
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I have a remote controlled car that runs on a rechargable sealed 12v battery. But the car has no speed controls. Only forward, reverse, left and right… The car’s standard speed is too high to be controlled on the remote without bumping into walls and objects. But I noticed a slow down on the car when battery charge reaches like 25%. So I tried to drop some voltage by connecting five 1N4001 general purpose silicon diodes in series to the battery…. The speed was now perfect… But after running the car for like 5 minutes, I opened the battery enclosure to see the plastic body of the car in contact with the diode, started melting due to the high temperature produced due to the high current thru the diodes…..
Is there any other good way to drop a 3v from a approx. 1A 12v battery such that no heat is produced….. ?
Theoritically, when I run the car slower, I should get more hours of battery backup….. But not if all those energy is wasted as heat……
Pls Help….
March 3rd, 2009 at 9:14 am
Nothing gets you to zero heat, but a switching regulator can get close. If you are electrically inclined, go to National Semiconductor’s website for a cookbook design that will work for you.
edit: guess I could include a link.