The goal here is to create a small, portable APRS monitoring station for use in public service and emergency events. The components chosen here can be powered off of a 12VDC supply provided by a vehicle, battery, or conventional desktop power supply. Most of the components are affordable, and some of them we may already have on hand.
BaoFeng UV-3R PLUS
Perhaps the club or a member is willing to donate an older HT that can be used for this purpose.
$28.95
A cable will need to be built to interface with the radio and TNC-Pi.
TNC-Pi
Comes as an easy to build kit. Stacks directly on the Raspberry Pi and is powered by it.
$40.00
Raspberry Pi Model B
An extremely small computer that can run Debian Linux, and the Xastir APRS software.
$39.95
SanDisk 8 GB Class 4 SD Flash Memory Card
$7.89 (varies)
USB Keyboard / Mouse
May not need to purchase new; can likely be sourced from someone's junk drawer?
USB cable - A/MicroB
May not need to purchase new; can likely be sourced from someone's junk drawer? Most newer cellphones come with one of these cables.
TBD; a small 12V television or TFT display could be used.
HDMI to DVI-D Male to Male Cable
Needed if a non-HDMI capable display is to be used.
$4.43
RCA Video Cable
Needed if a small television or other display is used. I have dozens of these in my basement; you do too.
RIGrunner 4004 USB
Can power RX radio, display, and Raspberry Pi. Can be connected to car cigarette lighter adapter or power supply with appropriate cables.
$79.95
USB WiFi (802.11b/g/n) Module
If Internet connectivity is desired for Raspberry Pi.
$19.95