missk

hi hero What If I were to use my microcontroller and a digital to analogue converter to create a variable AC waveform. Then I will use a high power op amp, which will feed into a step up transformer to enable me to go from 0-220V ac. Do you think the idea has any merit? Also it eliminates the need for the stepper motor and keeps cost much lower.

Hi I need to use an Atmega MCU to vary the voltage from 0-220Vac on the primary of a 220V//2000V transformer. I was looking into using a stepper motor to control a variac using a pulley/belt system. But considering that this is only a part of the bigger picture, it seems complex as I need to take into account torque considerations and such.Any chance that somebody may have a better or different idea?