Arcade Claw Machine

I am working on a claw machine and would like to have the option to control the potentiometer to 5 different set voltages, for example each time someone plays the claw would get stronger/weaker. or to have 5 different set voltages at random. This would range from 20v to 27v. right now its has an analog potentiometer.

Thanks!

lostarduino: I would like to control a digital potentiometer using Arduino and step voltage from 20v to 27v at set ratio. I am trying to retrofit a claw machine to a win ratio from a constant set voltage, so that when people play, lets say 1 through 5 tries the voltage will be set to maximum. I am open to any ideas or different ways to go about this.

Thanks!

Wow. No offense, but your wording is very confusing. Can you restate your project operation more clearly?