Need a small manually adjustable 12vdc PWM NO IDEA HOW TO SEARCH

Can someone help me find a 12-16 vdc Manually adjustable PWM for a 1-3 amp mag switch?
I’m a newbie and do not know how to proceed

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Hi @Matt_50 and welcome to our forum.

Is this something you are searching for https://www.robotshop.com/en/servocity-manual-servo-driver.html ?