No doubt about it, the Raspberry Pi is nothing short of a homebrew phenomenon. Since its release in February 2012, the British micro-mini-computer has enabled legions of amateur inventors to develop projects both weird and wonderful. Here’s a run-down of the most impressive applications, ranging from weather stations to retro arcades to a supercomputer array on a Lego rack. See if any of them inspire you to do the same.
1. Build a Nixie Clock

With their gaudy neon digits and retro styling, a Nixie tube clock would look great in the home or office. Martin Oldfield built a clock that receives Network Time Protocol data from the internet via the Raspberry Pi, and is accurate to 10-thousandths of a second. All you need is a RPi and an SD card, a self-assembly Nixie Clock kit, and a Wi-Fi dongle or ethernet cable. Step-by-step instructions.
2. Build a Weather Station

Interested in meteorology? Use the RPi to build an inexpensive weather station that can process data in situ. The shopping list for this project would be an RPi, a USB Wireless Touch Weather Station from Maplin, and an ethernet cable. Visit Dragontail Mapping for a tutorial.
3. Build a Retro Arcade Cabinet

The MAME emulation software is an important preservation project for vintage gaming software. Over at the Raspberry Pi blog, a chap known only as “Darren J” explains how he installed an RPi running MAME into a replica gaming cabinet, complete with working coin slot. Recreate your misbegotten youth by placing it in a darkened garage; cigarette butts and cans of fizzy pop optional.
4. Build a Better BigTrak
