Western Washington University

Electronics Engineering Technology

Christmas Project 2004 - DFS-80 Digital Fish Scale


This digital scale uses an aluminum load cell and strain gauges to measure the weight of fish. It uses the TC7107 A/D converter seven segment display driver. The load cell should be able to accurately measure 199.9 lbs and stay within the elastic limit of the aluminum. I have, however, placed a rather optimistic 80 lb limit on the load cell.  The schematic and the board layout was designed in the Eagle Layout Editor.  The schematic has an error on it, if you can find it I'll send you a nickel.