4 Channel Ac Programmable Light Dimmer Module Controller Board For Arduino, Raspberry Compatible 50/60hz

The media could not be loaded.  I'm using the dimmer for a Halloween display. Overall, pleased with the product. The only negative I have is that the screw-down terminal blocks to connect the load/neutral wires are a little flimsy, and really don't accommodate anything above 16-18 gauge wire. Other than that, the product seems to work as advertised. The Arduino sketch examples that they provide are for 50hz, so you will have to make the recommended timing changes. The hardest part was figuring out the dimming array values. For my situation they were between 4 and approximately 90. Also, not sure if it's a logic problem in the controller, or maybe an Arduino compiler or library problem, but I had to do some weird coding in order to issue two dimming values back-to-back (e.g., to make the lights flash). All-in-all, finally got it working the way I envisioned, so would recommend the product.