The System Controller has been designed so that all the parts you will need are available in common platforms and from common vendors.
System Controller
- Beagleboard Rev C Starter Kit — includes Case + Power Supply + USB Cable
- SunFounder 8 Channel Relay Shield Module
- Phantom YoYo Ribbon Cable Male to Female
- Pelican 1060 Micro Case with Clear Lid and Carabiner
- 12 feet Extension Cord
- 12 Positions Terminal Electric Barrier Strip Block
- IKEA 14″ Cutting Board
- Pillar Standoff Spacers
- Adafruit Soil Temperature/Moisture Sensor
- Analog Soil Moisture Sensor
Analog Soil Moisture Probe

A nice pair of wire strippers

Flux core solder

Decent needle nose pliers

Smooth wire clippers

Wire holder

Soldering iron

Electrical Heat seal tubing

Smaller electrical Heat seal tubing

15K Ohm resistors

Electrical tape

Analog moisture sensor

Volt measure

Glass of water

Beagle bone board to test the sensor