Make a wiring diagram on how to connect everything and write it up

Walkie Talkies
NEED 2 OF THESE

Contact: Amazon.com
Item Number: UV-82
Price: $26.50 each or $53 total
Shipping: Free 2 day with Prime or Free standard without Prime

Single-Board Computer (These are what the software has been tested on)

Raspberry Pi 2 Model B
Links: http://www.amazon.com/Raspberry-Pi-Model-Project-Board/dp/B00T2U7R7I, http://www.amazon.com/JBtek%C2%AE-Black-Case-Raspberry-Model/dp/B00ONOKPHC
Cost: $37 (+$7 for case)
Shipping Time: Prime (2 Day)

“Easy Digi” board (2x 600 ohm line transformers for audio I/O, opto-coupled PTT on RS-232)
Link: http://www.ebay.com/itm/EASY-DIGI-UV-5R-INTERFACE-for-laptops-and-desktops/221597499367
Cost: $37 (+~$7 shipping)
Shipping Time: ~3-6 Business Days (USPS Expedited from Texas)
This is needed to interface the radio with the SBC, as per the hardware recommendations on https://openrepeater.com/getting-started/hardware. This is the only vendor of preassembled units, although constructing our own from components is not out of the question.

/ The cables needed to connect the easy digi (unit may or may not ship with the needed cables)

3x 3.5mm <-> 3.5mm cables (male <-> male)
Link: http://www.amazon.com/StarTech-com-MU3MMS-3-5mm-Stereo-Audio/dp/B004G3UK5C
Cost: $2 per
Shipping Time: Prime (2 Day) / Add-on item

1x 3.5mm <-> 2.5mm cable (male <-> male)
Link: http://www.amazon.com/uxcell-2-5mm-3-5mm-Audio-Adapter/dp/B005436T44
Cost: $4.50
Shipping Time: Prime (2 Day)

USB Sound Card (Analog -> Digital, 2x 3.5mm -> USB)
Link: http://www.amazon.com/external-Adapter-Windows-Microphone-SD-CM-UAUD/dp/B001MSS6CS
Cost: $5
Shipping Time: Prime (2 Day) / Add-on item
OR alternatives that do the same thing
Needed for the SBC to be able to process the radio signals