Lets build a universal serial port adapter for your Raspberry pi
Check video out for detailed instructions!
List to buy stuff: (Ebay links)
Pin headers: https://goo.gl/TKv3QN
Silicone wires: https://goo.gl/mhLPGp
MAX3232 TTL converter board: https://goo.gl/ziUsU4
The mini version of the adapter
The slightly larger version
Raspberry PI pinout