I'm planning to work on a new project for use in my work. On the console
of a locomotive there is a 74VDC plug and would like to step it down to
12VDC for use of other electronic devices that would plug into a car
lighter plug. I though of using a 7812k but I see the max input voltage is
only 30VDC. I then though of using a step down transformer, but I really
don't want it to be to big and bulky since I have to carry it in my work
bag with me all the time.

What does anyone recommend? The current draw should not be too much like 3
amps at the most. This would be used to power cell chargers, PSP chargers,
etc.

Emory Lehman

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