[Mike Betts]

Originally Posted by Kevin Sevcik

Erm, so I'm confused. I was under the impression that the Vics have a PWM output instead of a variable voltage output. As such, you can't really measure the output with a standard multimeter. This would be why Mike Betts was talking about checking it with a scope.

This has not bearing on if the RPM output is linear, however. I think I'll do a Simulink model tonight and see how RPM varies with duty cycle, if I can get enough data on motors and the PWM output.

Kevin,

The both the input and the output are PWM. I was asking about the input.

The output is a PWM whose duty cycle varies from 0 to 100% so it can be easily read with a multimeter.

The input is a RC compatible PWM. See (Servo Basics) for a good explanation. A multimeter will not necessarily give good results. That is why I suggested a scope.

Mike