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1 comment of this product found across Reddit:
Spiritual_Bid_7162 /r/FTC
2 points
1970-01-20 00:06:43.804 +0000 UTC

we use the DC motor controller from amazon. works great with all dc motors.

https://www.amazon.com/gp/product/B071H2YQG5/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

you can reverse the polarity and control the voltage to identify the optimum speed.