Need help with LED power for my custom scanner.
Posted 14 August 2017 - 12:56 PM
Posted 15 August 2017 - 08:13 AM
It's been a while and I've actually forgotten most of the details, but I built a custom lamphouse for a 35mm scanner rebuild project a few years ago. RGB LEDs, for doing three-flash scanning, as well as an IR array for making dustmaps for restoration software. Never had any problems with flicker or scan lines, but I was also using a machine vision CMOS camera and not a digital cinema camera. There may be inherent differences there, since I don't really know what the Red camera you're using is doing when it snaps a frame.
Here's a look at mine - never quite finished it, but I did get it working for all three colors plus IR (and you can do white by mixing RGB). I 3D printed a simple lamphouse lined with mylar, and had some diffusion material on the opening to soften the light a bit. Seemed to work quite well.
You can click forward on that, there are several shots and a short video of it in action. The earlier photos in the album are the disassembly and rebuild of the scanner transport. Everything is controlled with an arduino.