BOJACK Low Voltage DC Motor Speed Controller PWM 1.8v 3v 5v 6v 12v 2A 30W Adjustable Driver Switch 1803BK 1803B (Pack of 2 Pcs)

This compact PWM controller handles its full 1.8–12‑volt range cleanly, giving smooth, predictable speed control to a 12‑volt fan without any stutter or dead spots. Installation is simple thanks to the clear terminals and small footprint, and the board feels sturdier than most budget options with solid solder joints and a responsive dial. Functionally it does exactly what you want — stable output, wide adjustment range, and no noticeable heat buildup — making it useful for fan tuning, small motors, or battery‑powered projects where efficiency matters. A dependable little unit that performs well for the price.

FANTASTIC ITEM! Great price! Works perfectly as described. I needed something to make a 3V DC motor run at a slower speed. Unfortunately I’m not well versed in electronics. I was going to ask someone on FB what to do. Then I thought of asking google AI what to use. It came up with this very controller. No instructions but super easy to install. The four terminals are clearly marked: Motor plus and minus, and Power source plus and minus. Your wires are screwed in with tiny screws and held firmly. Can’t be any easier! It’s small and doesn’t take up much room, and the control knob clicks when put turned off and on. There’s a pilot light showing when it’s on. Two for $7 with free Prime shipping! You can’t beat this!

These work perfect for slowing down my monster in a box and windshield wiper

I installed this on leds strip white lights. Everything I have done is correct, as in power from battery ---->to the fuse----> to the on/off switch and finally to this voltage step down or up. The lights lights up and dim down...... but with NO power to it and deactivating the on/off switch, somehow it still sends power to the lights. If i turn up the voltage when switch is OFF it finally shuts down like it should. Its a mystery

I burned out the factory one in a 12 v fan. This resurrected the fan but did not fit in the old cigarette lighter plug so I had to McGyver a small box to enclose it. The fan works again though.

Prior experiences with Bojack products have been excellent and this is no exception. It is not a potentiometer but an easy to use power regulator that works very well with a Practical design for hobbyists.

Electrically, the two I received worked just fine. I'm using one to control a small fluid pump, the other for a blower motor in a small filtration system. They perform well enough. The fluid pump runs 15-20 hour duty cycles at 3.3-6V and about 1-1.5 amps. The blower pulls less. Neither has had a problem with the controller. My only negative issue is in the quality of the assembly on the PCB itself. Neither knob was mounted level to the board, which made the knobs sit cockeyed compared to the face of the control panel. I had to remove and resolder both, so, minus two stars for the added sweat equity.

I used them for LED lighting. A lot of the various brands will flicker, very annoyingly and I bought these to replace some older ones, that flickered when new, like many do. So far, both are nice and steady, after a months use... I will update if they fail, but so far, this was a good purchase.