I'm designing a circuit that will open a chicken coop when the sun comes up. I've attached a bungee cord to the door which opens the door when a pin is released. This pin is released by a car door actuator: http://amzn.eu/9r2gjnP
To power the actuator I've picked up a solar panel: http://amzn.eu/e3XX7WB this doesn't have the current to power the actuator so I'm thinking of pairing it with a rechargeable 9v battery.
I've come up with this but am not an expert by any means so would really appreciate it if someone could sense check it for me? Falstad Simulation
The idea is that the sun coming up triggers the LDR, this triggers the 555 timer which in turn allows power to flow to the actuator for a couple of seconds. I may have overcomplicated it so welcome opinions! :)
UPDATE 10/07/2018 15:00 (BST)
Based on feedback from @Chris Stratton and @brhans
UPDATE 13/07/2018 21:13 (BST) - Lower tech solution
So I decided to go with @Drew's suggestion of a lower-tech solution. However, I've run into a problem. My relay is simply making a buzzing noise when I expose the LDR to light. Is there a fundimental mistake in my circuit design? Falstad Simulation V2