Hi all.....New to this forum, but not new to electronics. I'm doing some motorcycle work, and as part of that, I'm swapping out my instrument cluster. My new cluster has a fuel gauge on it (digital segments), however, my tank doesn't have a fuel sensor.
I was thinking it would be cool to convert that fuel gauge to act as a battery monitoring volt meter. In other words, "Full tank"=13v, half tank = 12 v, and empty= 11v (or something to that effect.....a different range would be fine as long as it was in that general ball park)
The fuel level sensor works as a variable resistor. Full tank sends (0-10ohms). Half Tank-50ohms, Empty-100ohms. Assuming that the sensor is receiving a constant 12V, the fuel gauge receives 2.4A (used 5ohms) for full tank, .24A for half tank, and .12A for empty.
Thus, I am looking for some sort of sensor that when it gets 13v, it outputs 2.4A; 12V outputs .24A; and 11V oututs .12A. This means it would need resistance of 5.4, 50, and 91 ohms respectively........A variable resistor that is voltage sensitive.....Varistor like, but not quite.
I've racked my brain and I can't think of any single device or simple circuit that would easily do this. Am I chasing an impossible solution here or am I just not thinking of something.
I was thinking it would be cool to convert that fuel gauge to act as a battery monitoring volt meter. In other words, "Full tank"=13v, half tank = 12 v, and empty= 11v (or something to that effect.....a different range would be fine as long as it was in that general ball park)
The fuel level sensor works as a variable resistor. Full tank sends (0-10ohms). Half Tank-50ohms, Empty-100ohms. Assuming that the sensor is receiving a constant 12V, the fuel gauge receives 2.4A (used 5ohms) for full tank, .24A for half tank, and .12A for empty.
Thus, I am looking for some sort of sensor that when it gets 13v, it outputs 2.4A; 12V outputs .24A; and 11V oututs .12A. This means it would need resistance of 5.4, 50, and 91 ohms respectively........A variable resistor that is voltage sensitive.....Varistor like, but not quite.
I've racked my brain and I can't think of any single device or simple circuit that would easily do this. Am I chasing an impossible solution here or am I just not thinking of something.