trackit VT10 - Analog Input (AD1;AD2) Application Example

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-12- TrackIt Limited – V 7.5 April 2013

Power for ignition

Input 4

Ignition Switch

5.5 Analog Input (AD1 and AD2)

Input voltage should be 0~6V.

Application Example - Fuel Level Sensor

Fuel level sensors supplied by us are resistance-type sensors with output resistance: 0-200Ω(ohm)

For the circuit shown on the right picture, if VCC is 12V, R should be 200Ω (ohm) and if VCC is 24V then R should be

600Ω(ohm) to make the input range to AD1 or AD2 is 0-6V.

Below formula is for calculating the fuel percentage left for this fuel level

sensor:

AD value

Percentage Left =

* 100%

1024*2

–

AD value

Note: The value must be converted into decimal, for example, 0x0267 is 615 in decimal

Battery