This is the third (and final) video on the DIY maskless wafer stepper project. It discusses the electronics and software.

0:00 General intro
0:49 Wafer stepper system overview
1:48 Dynomotion KFlop controller card
2:42 Wafer stepper control electronics
6:32 Digital wafer stepper software

I tried to build it from very cheap components, most of which I bought second hand on Ebay. I also used an Arduino Due and a KFLOP CNC card from Dynomotion to control the movements and used Microsoft Visual Studio for programming the code.

If you are new to the project you might want to check out the previous two video's first:

First video (optics)
   • Maskless Wafer Stepper Part1: Optics  

Second video (mechanics)
   • Maskless Wafer Stepper Part 2: Mechanics  

I also published the first results of making small Fresnell lenses with this machine:

   • Micro Lenses made with Photolithography.  

This video shortly features one of the art pieces of the dutch graphic artist Maurits Cornelis Escher. I'm only using this picture to demonstrate the principle o image stitching as it is used in my software and not for any commercial applications. If you are interested, please visit the Escher foundation and take a look at his fascinating work:
https://mcescher.com/nl/stichting/