On Fri, 11 May 2012 22:55:59 +0100, Cristiano Cesaretto wrote: >I am building my racing simulator and I want to use a real fuel level and >water temperature gauges. >I would like your opinion about which way to drive these gauges is the >best. Those gauges often use a bimetalic strip that moves the pointer by bending from the heat from the variable current flowing through it. Check if that is what you have! In my opinion you should not try to match the resistance of the sender, but instead drive it with a PWM switching signal, perhaps with some fixed resistance in series. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .