Automatic Super Thin Chamber AMS LED Light

Hey!……Turn off that light!!! (fond memory from a Bugs Bunny cartoon) If you are like me you probably send print jobs to run at odd hours. I love my previous LED Chamber Light project but I did not like that it would stay lit well after the print job completes, maybe even for days. This had to stop. There are a million ways to approach this problem however my method guarantees that you do not have to poke around inside your nice shiny machine and risk damaging something, or even worse, voiding your warranty. I wanted a solution that was 100% independent of the machine and monitored it from outside the machine envelope. I also wanted it to be undetectable. It should be slick, resemble OEM and you should not notice it is there. Since the top of the machine is glass and you can see when the print head is at its resting position, I thought it would be clever to monitor that. And like magic, I got a “freakin' laser beam” to do it for me. The Parallax Ping laser device (see photo) is an u