Help! DIY 4 amp L297/6203 driver

[Ross77]

Okay - just one slight change - pull the reset low with a 10k resistor. That will ensure that the L297 is in a reset condition before the PIC starts up.

GP3 can only be used for a digital input, so there's not a lot you can do with it, I'm afraid!

Like so?

Connect one pin of the pic to a 3k9, the other to a 19k.

Now connect the other end of the resistors to the top of the VR, the bottom of the VR connects to 0v and the wiper to VRef.

That's it!

Thanks, think i under stood that better.

Ok so Kwackers option is easy to do and gives me adjustable vref with a fixed idle current at 25% (which could be changed by swapping out the 19 K resistor?) and Tribbles options uses a few more trim pots but means I can easily adjust Vref max, vref hold and the delay time. Correct?

For the trimmers am I looking at quality multiturn (£1 each) or will the cheap low wattage single turn (10p) be ok? would need 9 for 3 axis.

Thanks again. looks like its nearly there :dance: