My question is that can the arduino vary the voltage during a PWM?
If I used my PWM output to create the 'average voltage' using the duty cycle. This signal then into a DAC and then into an Op-Amp?
This will create my AC signal matching what I need in the first post?
The signal is not driving anything
I am wanting to create the signal to fool the vehicle ECU into thinking the engine is running when it isn't.