After a tedious afternoon of soldering, I have the three counters needed for this prototype mounted along with corresponding stepper motors and driver circuits. I still need to add a circuit board to the middle layer to connect the upper and lower layers (to connect the counters to both the card reader and the microcontroller used for sequencing). Anyway, a pic of the (rather awkwardly sized) machine so far:
I finally feel like I’m starting to make some progress on this electromechanical computer project. Behold! My prototype electromechanical punch card reader!