Looking for a way to measure the fuel level for an RC car tank ! help !

[Qdeathstar]

What about mounting the tank on a scale, would solve the vibration issues?

[polymorph]

If you use my dual 555 circuit with the RC smoothing network and measure the DC level, that may act to average out variations due to tank vibration.

I'm not sure how mounting the tank on a scale solves the vibration problem.

[Qdeathstar]

Well, I mean, of you measured the weight of the fuel, you wouldn't have to worry about froth... I hadn't considered g-forces in my intial post, however.

[firashelou]

Don't understand you question.   You open the tank fuel fill hole and glue in the potentiomenter.  Attached to the pot shaft is a 90deg elbow.  Attached to the other end of the elbow is a short rod.  Attached to the other end of the rod is a float.  All these items are scaled to the size of your tank.  You attach two wires to the pot and use a voltage divider to measure voltage.  That's how virtually all car fuel tanks are measured.  It's simple and accurate.

i meant my tank has a closing cap, do you mean i must place the pot inside the tank under the closing cap ?

[superair78]

https://superair78.wordpress.com/4-la-technique/4-1-les-sondes-de-mesures/4-1-2-realisation-dun-temoin-de-reserve-de-carburant-avec-un-arduino/