Do they make fail-safe, ramp-style solenoid latches?
I'm making my own "smart" cat flap because the ones on the market are super unreliable, expensive, and functionally limited. I have two barn cats I'm trying to keep safe and this latching mechanism is frustrating me.
I'm essentially wanting two solenoids, like the one pictured here, which will be mounted on either side of the flap. This will allow the flap to passively close from either direction, but need an unlock sequence to open from an RFID reader/beam sensors.
My issue is I need the option of a fail-SAFE, and almost all of these are fail-SECURE. The reason for this is we lose power quite a bit where I live, and I don't want my cats trapped inside in the event of an emergency. Is there anything like this you can point me to?
Even if I just get a better set of search terms I'm more than happy to look myself. But I am at a loss.
Thank you all!
Edit One more thing. I'm also designing this to have the option of directional access. I want to be able to say yes to entry, no to exit, yes to exit, no to entry, no to all, yes to all.
So in the event one of the cats has to be locked inside after a vet visit or something, I can lock them inside.