Finally, after more than 1/2 year of work this project is completed; well, almost, I still need to tweak software, but I won’t have time for the rest of the year. Here is a quite exhaustive writeup, so nothing needs to be added for now in this blog.
The plan is to develop next another Arduino shield as a companion, very stable laser diode driver. This will be hard since noise and stability requirements will be harder, and not easy to reach given the noisy digital environment. As preparation I have set up an extremely sensitive low noise amplifier for measurements (see previous post).
Moreover, a miniature combo board of TEC and laser diode controller is planned, but only after having gained more experience with the present controllers.
I may sell some of the controllers at a later time once the complete package incl diode driver is done and turnkey useable.