DIY gate remote opener for under 50$

I decided to make a system for as cheap as possible and still as good as possible. I wanted it to be reliable, good looking and cheap. Price for the parts is roughly around 30$. I used cheap Arduino clones of eBay, Arduino modules with relays, a reciver module with remote, some LED's and a finished warning light enclosure. None of those cost more the 5$ per piece. Everything else was made by me. Hope you will get a similar idea and share you work and enjoy the video! Here are some links for buying the parts: http://s.aliexpress.com/fyUzMNvA http://s.aliexpress.com/7fqIrAVz http://s.aliexpress.com/nANBNf6V http://s.aliexpress.com/EjmMNnmU http://s.aliexpress.com/IfUfeAZF