Hi again only me,
I have got my motors working now will put a pic in a bit later to try it out with PWM but another 'problem' has poped up.
I just realised that a old problem has come back to haunt me, at the moment i run the motor supply directly from 6AA rechargeable batteries (NiCad - cheap ones £1 each but only on 3rd chage cycle...). After charging i get about 7.8V and this levels to about 7.2V after 15minutes running with no load on the motors.
Problem is this, i will probably use timing to excute turns. But with a voltage different ov 0.6V this could make for over / under turning. I am willing to sacrefice some speed to regulate the motor supply, but still have the problem of regulating it!
ok then, the maximum the motors can produce is 2A each (talking max stall current, dont know how it occours, probably using a vice and a wrench to hold it....) Anyhow. So i need a max of 4A regulation.
I have heard of using a zener in parrallel? what voltage would i get / would it handle the current!
So to recap, LDO regulation to about 7V, max 4A load. Over to you.
Thanks,
- Martyn
I have got my motors working now will put a pic in a bit later to try it out with PWM but another 'problem' has poped up.
I just realised that a old problem has come back to haunt me, at the moment i run the motor supply directly from 6AA rechargeable batteries (NiCad - cheap ones £1 each but only on 3rd chage cycle...). After charging i get about 7.8V and this levels to about 7.2V after 15minutes running with no load on the motors.
Problem is this, i will probably use timing to excute turns. But with a voltage different ov 0.6V this could make for over / under turning. I am willing to sacrefice some speed to regulate the motor supply, but still have the problem of regulating it!
ok then, the maximum the motors can produce is 2A each (talking max stall current, dont know how it occours, probably using a vice and a wrench to hold it....) Anyhow. So i need a max of 4A regulation.
I have heard of using a zener in parrallel? what voltage would i get / would it handle the current!
So to recap, LDO regulation to about 7V, max 4A load. Over to you.
Thanks,
- Martyn