Now that we have this fully analyzed, does anyone have any thoughts on an appropriate circuit? For the prototype circuit, let's assume that the resistance of the sending unit is 5 ohms full and 100 ohms empty and that both ends of the variable resistor are accessible. The Weston meter movement...
I have a friend that is trying to create a collection of authentic instrumentation for an old car replica he is building. I happen to have a bunch of old Weston meters. Weston actually made voltage and amperage meters for automotive applications in the old days that looked just like their other...
I'm about 95% certain that the tank sending unit resistor is isolated from ground. Many gas tanks are plastic these days. Also, a reliable ground through the tank attachment straps on even a steel tank over time is iffy.
In the recent past (30?) years, fuel gauge circuits appear to consist...
Typical fuel tank sending units have a resistance of 0 to 10 ohms in the full position and 90 to 240 ohms in the empty position. I have an old Weston 50uA meter I would like to use as a fuel gauge. I need help with designing an analog circuit that will drive the 50uA Weston meter from the tank...