Getting 4.2V from a 5V PSU for a Stepper Motor Driver Board

Hi all,

I'm trying to put together a stepper motor driver board using L297/8's.

The stepper motors I'm using are rated bipolar 4.2V/phase at 1.2A/phase.

I wanted to use an old PC power supply, as it can nicely do 5V at upto 22A ready done.

But what's the best way to get 4.2V from 5V at about 3A per driver board and be able to run it with a L298???
I've tried looking up voltage regs at 4.2V with no luck, or zeners...
Would a simple series resistor or voltage divider do the job... but at 15W could they handle it???

Anyone any ideas...


Cheers all

Kev/.

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