PWM AC Voltage Dimmer 50/60Hz 80-240VAC for Arduino Raspberry Leading Edge Dimmer for AC Motor Pump Fan Light Heater Max 500W Pro Engineered Onboard Snubber Circuit - Compatible Worldwide

This product is very well made. It has the proper separation between the high voltage and low voltage sections for good protection. The screw connections on the high voltage are not the cheap ones I've seen on other boards and all connections are well labeled. If mounting is needed there's large enough holes for that purpose. As for controlling brightness, practically all of the LED bulbs were fine with only a few, 2 out of 8, having problems and that was at the lowest levels. Regular incandescent bulbs were fine. Control worked fine using a DC voltage of 0 to 5 volts and also a PWM signal from an Arduino Nano. While there are cheaper dimmers out there, this was well worth the money as I won't have to worry about it bursting into flames or burning out my controller. I will be buying this product again.

Very useful for tinkerers. Dims lights and controls the fans (which is my purpose) very easily and very controlably from an MCU.

I'm using this for some Halloween lighting effects. I'm replacing an older implementation that used a zero-crossing detection / phase-cutting approach which never matured beyond the breadboard and arduino. It worked pretty well but the program to control it is quite complicated and the entire breadboard setup is pretty fragile (i.e. more than once I've found something disconnected and it was a lot of brain power to get things back to working). This PWM control is SO much simpler. It lends itself really well to intuitive design of the arduino program. Bonus: the entire thing is manufactured on a nice PCB form factor (no more loose parts).

I use an esp32 microcontroller to vary the dimmers dc current to control the speed of a swamp cooler fan. I would have rated 5 star for its build quality, however I lowered by 1 star because 100% programmed speed control only seems to deliver about 95% of the available input 120vac.

Simple to use, careful safe PCB design, and so far rock solid. Dims light bulb loads smoothly using an asynchronous pwm signal (no need for zero cross detection and direct triac control). I'm using this module to control a 30 watt load of small light bulbs inside my rain gauge. The heat from the bulbs is used to melt snow when the rain gauge would otherwise just get piled up with snow. This little module works great controlled from the PWM output of a raspberrypi. The PCB construction is solid and clean. The high voltage connections are on the opposite side of the PCB from the low voltage connections making it easier to construct a safe project. This is a great product for safe variable control of AC loads. Cheers!

Great unit! works as advertised! Takes a PWM signal as input to modulate an AC load. Detects the presence of AC signal. Really nice to work with, easy to wire using the excellent instructions. Opto-isolation between low- and high-voltage sides which makes it really great.

These are awesome. No fooling around with zero-crossing signals and interrupts, just deliver a variable voltage (or equivalently a PWM signal, I have used both without issue) to the device and it handles the AC phase control internally. It holds up to its rated power, I have run these at over 500 watts for at least 10 minutes without issue (though a fan is advisable for longevity). Most impressively, it easily drove a particularly troublesome AC motor and delivered excellent speed control, where all other dimmer boards I've tried have failed to do so. The onboard snubber is a nice touch, so you don't need anything else in the circuit for inductive loads. The build quality is obvious; these are a quality product. I wasted so much time trying to troubleshoot other popular AC dimmers; even when they worked they were very finicky and prone to failure. Save yourself a headache and get this.

Always nice when you get a module that just works. No headaches. No configuring. Video speaks for itself. Works great.