How would you make the following?
I'm looking for a 512 channel LED strip (varying size) dimmer, controlled over TCP/IP or UDP.
My dream board has:
- 512 individual channels @ 12V
- Each channel capable of sinking up to 0.3A (ideally 0.5A max)
- Overall average current per channel 0.2A (80->100A max total is more than adequate, won't always use the full 512 channels)
- Predetermined fade time between on/off states, around 0.5 seconds
- IDC connectors or screw terminal plugs in groups of ~16
- RJ45 cat5e interface to control over network
- The ability to send simple commands over TCP or UDP in a form like ".c,s;" (where c is channel number and s is state to switch to 1/0, on/off)
- Decent latency times (i.e. unnoticeable delay when lighting all channels at once)
- Industrial format (i.e. DIN rail mountable, insulated)
I've tried building and buying various systems. I developed an mbed/MM5451 board with high channel count (144) but low current rating. Tried working with PCA9685 chips, couldn't wrap my head round the functionality. Tried shift registers and darlington arrays with arduino, though scaling this up was problematic. Seen plenty of 3rd party solutions, non of which adequate. Most successful solution to date was daisy chaining specialist DMX boards, with an arduino intermediate and a Raspberry pi as a command server.
After a year of tinkering, I truly hope someone can point me in the ultimate direction. I usually end up compromising over current vs channel count with inadequate solutions to the same problem. Certainly not an electrical engineer, would appreciate an experienced opinion.
And is DMX suitable considering I have no need to vary brightness (besides the fading between states)?