I have used two DMX Dongles for my Christmas lights:
- Enttec Open USB widget
- RPMs USB DMX Pro
The Enttec Open work great but was subject to a fair amount of abuse and kept blowing the RS-485 driver chip.
RPM got around the issue by including isolation between the USB and the DMX portion of circuitry.
Being based in Australia is always a challenge when sourcing components, especially for short run projects. The link below is an Excel Spread sheet showing all but one component are available as an equivalent from Bangkok based Futurlec.com.au.
My Futurlec.com BOM for RPM’s dongle Whilst the components selections work for me and I have not found any issue in its operation, you need to decide if the equivalent components are suitable for your application.
RDM Dongle
Today I finally got to play around with the Firmware in the USB Dongle. I can now Operate RDM controllers – Sweet, as I want to develop my own range of RDM controllers.
I am using the Open Source platform from RPM to develop the new controller firmware.
RPM DMX Dongle using my Futurlec BOM above