this microcontroller alerts the driver when the fuel reaches a critical low amount (set to 100l), when the tank will go under the set amount a on input will be sent used for a buzzer or a indicator light to warn the user.
once the fuel goes back above 100l it will automatically reset, so incase it goes under the fixed set amount once again it will work again.
is made to be simple and user frendly, fell free to include it in other builds on the workshop!