Motorized Window Blinds

I motorized the blinds in my bedroom to automatically close at night and open in the morning.

My apartment at the time had a street lamp right outside my window, so I would close the blinds at night but then find it hard to wake up in the morning because my room was so dark. So I designed some 3D printed components to add a motor to my blinds without any permanent attachments. The biggest challenge was knowing when to stop the motor. I tried basing it off time duration as well as a Hall effect sensor (see below) to mediocre results. In the end, I found the most robust solution was to use a current meter to detect the power spike that occurred when the stop ball on the bead chain would reach the top.