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Where can I find call a device that connects to a computer via USB and puts out current in AC or DC voltage?

This would be for various engineering/hoby projects similar to what you'd do with an Arduino except with a PC. I know how to do the programming just don't know what keyword to search for.

I know an actuator is only on or off I want analog voltage options. What keywords should I search for on Ebay.

Update:

Something like this except with more options than just on/off the output being anywhere from 0 to 10 volts or anywhere in between

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