Stepper Power Help??? Answered
I trying to design a cheap & easy (not ideal) bi polar stepper driver using the following components:
1. (1) A Bi-Polar motor rated at 12V 1A.
2. (4) 10A 250V Dual Throw, Single Pole Relays.
3. (1) Arduino UNO Microcontroller.
4. (1) ATX Power Supply.
I have the switching logic all correct from the UNO to the relays, and I have all of the wiring correct on the power side of the relay.
The problem comes down to shorting the PSU.My thought is the following, and I hope you gurus can either confirm, or correct my thought process (pretty please, and thank you).
Please see the Attached Pic for a basic schematic of what I'm doing.
12v = 1A * 12OHMS
12v * 1A = 12 Watts
Does this mean that somewhere within the power loop, I need a 12 Watt 12 OHM Resistor, to eliminate shorting out the PSU?
If this is true, what would be a practical solution other than using a big exposed spring, bar, etc... that would by its sheer mass resist all of this power?