Motor Controller Testing

[roystur44]

Jameco has a tutorial about PWM:

http://www.jameco.com/Jameco/workshop/diy/pwm.html

http://www.dprg.org/tutorials/2005-11a/index.html

https://www.jameco.com/webapp/wcs/st...0001_120539_-1

[sretter]

Originally Posted by roystur44

Jameco has a tutorial about PWM:

http://www.jameco.com/Jameco/workshop/diy/pwm.html

http://www.dprg.org/tutorials/2005-11a/index.html

https://www.jameco.com/webapp/wcs/st...0001_120539_-1

Awesome thanks!

[DonRotolo]

Originally Posted by Ether

The date of your post is 11/05...

Has anyone has built one of these lately? Where did you get the parts and what was the total cost?

Parts are Radio Shack, cost was about $15 including a nice little case. Can be less fancy if you have a good junkbox.

Originally Posted by PAR_WIG1350

Why do you need a dual timer? Most circuit I have seen use a 555.

One timer generates the pulses every x milliseconds, the other varies the output pulse width from 1 to 2 mSec. If you try to do both with a single timer you end up varying a parameter you don't want to vary. Plus, a 556 is really no more expensive than a 555...

[Gdeaver]

Remember, any device a team makes or buys must be able to generate pulses beyond the 1 to 2 ms pulses that are the hobby standard for servos. The jag has an extended range I believe is .8 to 2.2 ms for full speed. 1 to 2 ms for a victor.
Debugging can issues is a whole other can of worms.