Quantity   Component name
1 × Arduino nano
1 × DS3231 RTC module
1 × GPS breakout board with ublox NEO-6M
1 × External GPS antenna and SMA adapter
1 × Symmetricom SA.22c Rubidium oscillator
6 × 8x8 LED matrix w/MAX7219 drivers
1 × 15 VDC laptop power supply Found this for about $7 on eBay
1 × 2U rackmouint case
1 × 15V to 5V DC/DC converter