Driving motor ... help !!!

Cau2DaNang

· Hi

·I wanna drive a voltage motor (rating 4.5V). I have Basic Stamp 2 and DAC0832LCN. Can anyone teach me how to build and run a DAC circuit in BS2. Thx a lot.

Chris Savage

The DAC will not directly drive the motor.· It can't provide enough current, so you will need to do a little more research on how you want to drive the motor exactly.· Seems like you're trying to use voltage for speed control, where PWM would be a better solution in most cases.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Chris Savage
Parallax Tech Support
csavage@parallax.com

Cau2DaNang

Hi Chris. Thx for ur reply. It's correct. I'm trying to use voltage for speed control. Can you please give me some links about using PWM ?

Chris Savage

This link covers PWM control, but you will need to look around (try Google) for driver circuits for your motor.

http://www.parallax.com/dl/docs/cols/nv/vol4/col/100.pdf

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Chris Savage
Parallax Tech Support
csavage@parallax.com

KenM

Do you want the capability to reverse the motor?

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Ken

Cau2DaNang

· Hi

·Thx for your replies, mates. I don't wanna reverse the motor. I just wanna change the speed·of motor. I've used one motor miniature from Farnell (MM18). However, I dun know the coil resistance of this motor. That's why I can not choose the suitable transistor and resistor for:

http://forums.parallax.com/attachment.php?attachmentid=37701

·Can anyone please help me ? Thx a lot.

Cau2DaNang

· I've figured out·problem already. Thanks.