Quantity   Component name
1 × CUI Inc AMT203-V Absoulte Encoder http://www.digikey.com/product-detail/en/AMT203-V/102-2050-ND/2278846
1 × Heavy Duty (100% Solid Metal BACK) Retractable Reel Key-ID-Badge-Belt Clip http://www.amazon.com/gp/product/B000O8WKJC/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
1 × Arduino Pro Mini 328 https://www.sparkfun.com/products/11113
1 × Intel® Edison and Arduino Breakout Kit https://www.sparkfun.com/products/13097
1 × WiFi Serial Transceiver Module w/ ESP8266 http://store.hackaday.com/products/wifi-serial-module-esp8266