Bringsmart CCM6N DC PWM Motor Speed Controller 6V-30V Variable Speed Drive 6A Positive Inversion Mini Switch Controller (Speed Controller)

This in conjunction with a geared12Vdc motor and footswitch does a great job on my formerly hand operated bow press. Watch you battery polarity as if cross connected will blow up you board. No idiot proofing here.

I've purchased a few of these gear motors and will continue to do so, they are decent. I bought 3 of the motor speed controllers also, and one arrived dead and the other 2 went up in smoke after just a few minutes of use. I didn't do a post mortem on the dead controllers, but it seems from the extreme heat that the 7805 regulator is what burned up, or maybe the control chip itself shorted and then the regulator went next. With the damaged controllers, the motor still runs and can reverse, but only at full speed. The biggest thing I don't like about these controllers is that the control chip itself is not a standard, servicable part. The little 8-dip IC is actually an 8-bit microcontroller with custom programming, so if (when) it dies, you can't just swap in another. Competitors' products use an op-amp or 555 instead, which are easily replaced parts. Maybe there is some benefit to this custom chip, but it seems like overkill and it makes the thing end-user non-repairable. Sure, $13 is not a lot of money to replace the whole board, but a $0.70 IC is still a lot cheaper.

this motor os ... its so slow. But it sure does technically work! We used it to rig up a spider decoration for halloween and it was a hit!

Wired correctly to a 12v drill motor running on a 12v 5 amp battery the wires to the switch that changes the motor direction got so hot they melted and shorted out.

Works ok, but mine does no allow full pass through of 24v power supply. With the dial turned all the way up I am getting about 18.8v being fed to the motor out of the 24v available.