How to light up a led, only when printing in demo mode.

lazy_mosquito

I would like to light up a led when the extruder should work in demo-mode. So it becomes very easy in demo-mode to check when the extruder is activated in real-world. Would it be easy to assign a parallel pin to the extruder on the arduino board, or would it be easier to redirect the extruder pins to the LED?

strange question, i know but it is for a video project

Repetier

The only way would be writing a simple logic e.g. in M111 that toggles a pin for led on and off depening on demo mode. Just search Commands.cpp for case 111: and before break set your pin logic.

lazy_mosquito

thanks i will check it out.