i am trying to figure a way to convert 36v to 12 volts. i have 6,6v batts. wired in series.(?) (pos.to neg)=36v. i don't want to just pull 12 volts from just two of the batts. this seems to work these batts to hard. how can i build a device that will convert the 36v to 12v so that i may use standard auto lighting products. i do not know much about electronics so please keep responses as simple as possible. i have the basic ability to solder. i could most likely figure out how to fab. the components together. i just do not know what configuration of parts i will need.
The simplest method would be to use a linear regulator like the 7812. It depends on how much current you need. The 78xx series can handle abou 1.5A. More then that and you need to add a pass transistor.
1157s draw about 4-5A each. You're asking for a lot of current. If you don't have much electronics experience, I'd suggest buying a commercially available DC-DC converter. You can find one for around $100.
thank you for these answers. i would like to know if i could build this my self for less than the cost of an off the shelf unit. any one can just go and buy something. as far as my skills are concerned, i can follow most schematics, and besides failure is only a deterrent to those who are afraid to start over. i cant imagine that this project will be that difficult. if you don,t mind me asking a million questions i don't mind trying to build this how else will i get experience in electronics. I sure don' want to build a bunch of crap i don't need,to learn how.
You can probably make it yourself for less money, though the easiest way (linear regulators) will be less efficient.
Look up the datasheet on the 7812 linear regulator. It shows how to add a pass transistor to handle higher currents. One of those for each light is the simplest and probably cheapest way to do it.
lights on 36v golf cart
Posted - Sep 27 2008 : 03:09:20 AM
