Controller DROK Regulator Governor Modulator Review

Small Speed Controller. Works great with a 12V DC bilge fan. Super accurate and easy to control speed (and current draw). The only problem is that they didn't seem to have thought of how you would mount this thing. There is a ring around the pen's barrel, you can mount it in thin sheet metal, but the length of the threaded barrel isn't long enough for anything thicker than sheet metal, and there's no way to mount the device itself. If the walls are too thick, you may not have enough threads to…

Immediately after turning it on, I saw an arc of sparks on the casing of one of the radiators. At first I thought my $175 motor was blown, but the primary fuse is blown, the secondary fuse is not blown, which is what I checked first and thought the motor was blown, the fuse on the driver board is not blown. Arcs to the outer case, or if you grab it and squeeze the case it will flex into a heatsink and fail. The heatsink is close to the case, about a matchbox thick, so the outer case is very…

Make no mistake, this is a relatively cheap piece of equipment in terms of quality. It's good enough for my needs though, as I've used it as a speed controller for some of the DC fans in my apartment. Note that when driving an inductive load like a motor you will hear a fairly loud howl when the regulator is in the 10-90% range. ---- BUILD QUALITY ---- The aluminum heatsink is bolted directly to the board to dissipate heat, although it's the wrong size and barely covers the latest driver chip…