I bought a couple of these from ray for testing purposes as I am going into pixels this year. http://www.aliexpress.com/item/DC5V-input-DMX-to-WS2811-SPI-Converter-512-channel-output-max170-pixels-controlled/1019363088.html I hooked one of them up to a set of strings I also purchased and couldn't get it to work. The power led lit up but nothing from the output. I checked all of my wiring, supply pushed all the buttons, but still nothing. Fearing the string was a different chip, I tried another set, this time led modules. Still nothing. I tried strips. and again nothing. I then changed controllers, and there it is, all working as it should. Now I am going to assume there is a fault with the controller, but as I was always told never assume, I decided to ask here before going back to Ray and telling him it is faulty. Is there anything that I need to know about these controllers, ie do they have a reset or anything that may stop it working baring in mind I am not using an input, only demo mode.