T&L Publications

Is there any reason a current limiting power supply cannot be used to drive a stepper motor at a higher than rated voltage (assuming the same number of cols are being powered on for all steps).<p>Grant

Current limiting is fine now. Thanks again, Ron.<p>Grant

It was easy enough to bend up the V+ pin on the TL071 and connect it to the Vout. What a difference! It is now working fine, as far as varying the voltage. <p>I haven't checked the current limiting but the 'current limit on led' seems to make much more sense, so it is very likely fine. I'll cut the ...

I have been trying to make the power supply with adjustable voltage and current limiting, as outlined by T.J. Byers in the January 2003 N&V, page 22 (figure 3).<p>The adjustable voltage works fine. The voltage can be varied from about 1.5 volts to 24 volts out, with about 30 volts input to the 3...