My Attempt on creating a speed-o-meter with raspberry pi.
Got these for the project
http://www.ebay.in/itm/252615066312?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT http://www.ebay.in/itm/252641522207?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT http://www.ebay.in/itm/192079998558?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT [Not working properly]
And a raspberry pi B+