Simple Arduino Fuel Cost Calculator - LCD Display Trip Meter

Project Description:

I need to develop a simple embedded fuel cost calculator on Arduino. This is a basic device that tracks trip expenses based on fuel consumption, NOT a complex system.

Requirements:

Hardware:

Arduino Nano or similar microcontroller

16x2 LCD display

3 pushbuttons: START, STOP, and RESET

Simple plastic enclosure

12V power supply (car cigarette lighter or battery)

Functionality:

Initial Setup: Upon startup, select vehicle type (dropdown menu on LCD) or manually enter fuel cost per km (example: 0.10€/km)

Trip Mode:

Press START button to begin tracking

LCD displays real-time distance traveled in km

Trip is recorded every 1 second or per kilometer

Trip End:

Press STOP button to end trip

LCD displays: total distance (km), total cost (€), cost per km

Memory:

Keep last trip data displayed until next START

RESET button clears all data and restarts

Input Data:

Distance sensor (wheel rotation sensor via odometerOBD2 data or GPS if simpler)

Manual entry of fuel cost via keypad (€/km)

Output:

LCD shows: distance, cost per km, total trip cost

Simple, readable display (no graphics needed)

Nice to Have (Not Required):

Small buzzer for START/STOP confirmation

Data storage of last 5 trips

Toggle between € and $ currency

Budget: Maximum 150€ for parts + labor

Delivery: 2-3 weeks

Quantity: 1 prototype