rev counter Mar 13, 2011 18:57:26 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by johneb on Mar 13, 2011 18:57:26 GMT -5 I would like to make a rev counter using a 7 segment 4 digit led. I can provide 1 input per rev. Can anyone help me with a sketch or circuit pleaseJohn