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cncmachineguy
- 15th July 2011, 23:43
Anybody have any clever ideas how to generate +-10V control signals? I need this to drive a motor controller.
gadelhas
- 15th July 2011, 23:55
Anybody have any clever ideas how to generate +-10V control signals? I need this to drive a motor controller.

Sorry for asking, but it is really +-10V? Normaly the industrial signals are 4-20mA or 0-10V
gadelhas
- 16th July 2011, 01:28
Even so, if it is really -10V to +10V, i made the attached shematic and the simulation and it worked fine. Probably it can be improved, but since it's 1:30am, and it was made in 5min, i think its good. :confused:

If you have 100% PWM you will get -10V, if you have 50% you will get 0V, and if you have 0%, you will get +10V

If you want try it, and post the results.
cncmachineguy
- 16th July 2011, 01:48
Wow cool, thanks gadelhas!! That is really simple, I will gather the op-amps and give it a whirl.