If your pet has the freedom of indoor and outdoor life by means of a pet flap in the door - but you'd like more control over which side they're on - this is the project for you. Created by Instrucables user "tareker", it's an Arduino-based timing system that controls a servo in order to lock or unlock the pet flap. This gives you the freedom to keep the pets outside during the day, or in the cat inside during the evening - and with a little extra work perhaps Internet-control of the lock or position monitoring. Either way it's a simple automated solution to a common problem.
If you found the project above interesting - but not sure how to start with Arduino - then the best way to learn is with our Experimenter's Kit for Arduino:
The package includes a wide variety of parts, sensors and modules including: a servo motor, lights, buttons, switches, sound, sensors, breadboard, wires and more. Furthermore a Freetronics Eleven Arduino-compatible board is included to make this an extensive hobby experimenter, inventor and starter kit. However we don't leave you alone to figure it all out, included is a great project and instruction booklet, plus access to a supporting web page and software examples. In other words - this is everything you need to get started for a fun range of electronics and Arduino related projects!
So to get started or for more information and to order, check out the product page.