| We installed the doggie door today. After a brainstorm session, we went through several different ideas including:
Our plan is to use limit switches that will trigger when both ends of travel have been reached, as well as a bumper switch that can detect if something was in the way of the door as it was coming down. If more precision is needed, we could add an encoder to the motor, and potentially have a break-beam going across, similar to a garage door. Given the time constraints, our current approach is K.I.S.S. with the caveat that it must also be robust. KISSALAIR (keep it simple stupid as long as its robust). Tania wired the circuits and wrote the code for this first test, while I mounted the hardware. |