Counting Box¶

Inspired by http://www.hahabird.com/2013/01/the-counting-box-version-two/
a counting box.
two buttons :
+ & -
and a knob to choose 1, 10, 100 etc
and a display:

   ,a8888a,        88    ,a8888a,        88  8888888888     ,a8888a,        88  
 ,8P"'  `"Y8,    ,d88  ,8P"'  `"Y8,    ,d88  88           ,8P"'  `"Y8,    ,d88  
,8P        Y8, 888888 ,8P        Y8, 888888  88  ____    ,8P        Y8, 888888  
88          88     88 88          88     88  88a8PPPP8b, 88          88     88  
88          88     88 88          88     88  PP"     `8b 88          88     88  
`8b        d8'     88 `8b        d8'     88           d8 `8b        d8'     88  
 `8ba,  ,ad8'      88  `8ba,  ,ad8'      88  Y8a     a8P  `8ba,  ,ad8'      88  
   "Y8888P"        88    "Y8888P"        88   "Y88888P"     "Y8888P"        88  

les morceaux¶

special, difficile a trouver:
http://mouser.fr

general:
http://www.taydaelectronics.com/

specific, existe pas chez mouser:
http://cgi.ebay.fr/ws/eBayISAPI.dll?ViewItem&item=291224392488&var=590376285945&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2648

aussi:
http://www.aliexpress.com/wholesale?shipCountry=fr&shipCompanies=&SearchText=arcade+button&exception=&minPrice=&maxPrice=&minQuantity=&maxQuantity=&isFreeShip=y&isFavorite=n&isRtl=n&isOnSale=n&isAtmOnline=n&isBigSale=n&similar_style=n&similar_style_id=&CatId=0&initiative_id=SB_20141006074222