Another Pinside helped my with the same issue on my STNG ... Pay it forward !
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PWM DC 6V 12V 24V 28V 3A Motor Speed Control Switch Controller
PWM DC 6V 12V 24V 28V 3A Motor Speed Control Switch Controller
PWM DC 6V 12V 24V 28V 3A Motor Speed Control Switch Controller1/3
PWM DC 6V 12V 24V 28V 3A Motor Speed Control Switch Controller

$3.06
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Apr-06 to Apr-20
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Condition
New
Quantity9 available
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BrandUnbranded
MPNDoes Not Apply
UPCDoes not apply
Item Number121855642405
CategorySpeed Controls
in Business & Industrial
Item Description
1 x PWM DC 6V 12V 24V 28V 3A

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Any instructions on how to wire it up for a Stern?
Should be the same as mine ...the 2 wires going to the shaker are cut and the variable speed controller is routed between !
My shaker was actually moving my pin across the floor, I now can adjust to my liking ..