Speed reduction forward and reverse control switch

This is quite a bit of electronics for the price. I used this to cut down the speed of a motor I use to drive a small rock polisher. It works perfectly. I really appreciated the graphics on Amazon that show how to wire it up as it did not come with instructions on how to wire it. But, as I said, there is a great picture on the Amazon page that clearly shows how to connect the wires.

it works grate it did the job

Revised. This is a good controller, but I have edited this review to deduct one star for the noise. In all other respects it worked really well, but at lower speeds it does generate a whine that is loud enough to become annoying after awhile. Other than that, for my application of the controlling speed and direction of a 17V Buehler gearhead motor it functions smoothly. The board is neat, well laid out and has excellent soldering. The heat sinks on both the MC7812 voltage regulator and the 7575C NFET chip are substantial and should easily handle any heat rise which should be minimal for my application. I particularly liked that both the pot and the direction switch are mounted on wire connectors which makes panel installation simple. As seems common, this regulator has a large heat shrink shroud covering the direction switch terminals which had to be removed to fit into the panel opening. However, since the wires are individually attached to the board at a screw terminal it was simple to remove the shroud and add heat shrink to each wire. The board can be mounted in any convenient spot and the two wiring connectors have plenty of length (about 6 – 7”) to reach the panel. Overall, I found this to be an excellent PWM motor controller providing smooth speed and direction control, and provided that the low whine is not a problem for you as it really is not for me, then it should be a good choice.

A+++

As someone else mentioned, the screw terminal blocks are useless and won't hold the wires you put into them. This board's PWM frequency is within human hearing range, so it causes the motor to emit a high-pitched tone while it's running. Worst of all, the whole board stopped working permanently after a few hours of intermittently driving a 24V motor at about 50%. My project box wasn't even closed yet, so I know it was getting plenty of air. This board is just shoddily built in every way imaginable, not even usable as a temporary solution.

Great buy

Using this to control a gear motor (also from Amazon) to run a model railroad turntable. It allows the turntable track to be accurately set in alignment with the approach tracks without the need for special indexing control circuits.

It was a nice little unit shipped pretty good, but it does not do variable speed is forward reverse, and we turn the knob on. It runs wide open. We turned it off. It stopped. It does not variable speed

I really like it easy to follow the wing diagrams easy to install

Cannot handle 24vokt power. The switch wires started melting and smoking. Does not work. Complete garbage

Le contrôleur de vitesse fonctionne plutôt bien SAUF que les composantes sont de mauvaises qualité faisant en sorte qu'il y a un bruit strident au moteur lorsqu'on le fait tourner à basse vitesse. Je vais voir si je peux le retourner ou bien je vais en commander un autre de meilleure qualité. Tenez vous loin de cet article et ne l'achetez pas.

Arrives with no wiring diagram ... So I can not make it work and I think it's now ruined.