This bargraph circuit is from an ancient American documentation. It indicates the charge state of a set of 4 batteries from 9.6 to 5.2 V.
April 2017 - Mouser Electronics is supplying the SP8008 line of diode arrays of Litelfuse. The new...
This 80's circuit has an input resistance of the order of 880 M and gain 10, using operational...
Figure bellow shows how the 4510, a divide-by-1U, up/down counter with three-state outputs is...