If this has been asked previously, I have not yet found it. I've never posted here, so please accept my apologies in advance if this post isn't appropriately written.
I'm building a test rig for lighting control systems for training and demonstration. Ultimately I'll be using 16 manufactured dimming control modules, an Arduino Mega for it's analog inputs, and a TLC5940 to drive 16 channels for visual representations of each dimming module's level. The dimming level for each module will be picked up through voltage dividers on each module.
My question isn't about the TLC5940, or the Mega - I'm stuck on how to simulate an LED driver's 0-10v input.
Each dimming control module is able to sink somewhere around 5-10mA of current on the 0-10v wires. They do not source any voltage, and they're designed to manage a single LED driver each. I'd like to use a single power supply (12vdc with a voltage regulator most likely) to feed all 16 10vdc feeds, with each of them current limited to about 2mA each.
What is the dead-simplest way to provide the 10v with the current limiting?