I would like a lock for a garage door (roll up style). I would like the lock to be something I can control electronically, and also I would like it to retain it's state when the power is removed.
The power requirement seems to rule out any type of electromagnetic lock, and I considered a solenoid, but I'm not sure if I can get one that stays in the current position when the power is removed.
I think there are two types that will work - one with a latch on a solenoid (https://www.adafruit.com/product/1512) or possibly a small linear actuator that could be extended through a plate to lock the door. Are there any other options I'm overlooking?