Fuel Level Monitor with 15 Segments Bar-Graph Display

Rajkumar Sharma
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easy
Tested
SKU: EL150128
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This Fuel level Monitor allows users to measure the fuel level using a resistive float sensor in the fuel tank. The project measures the fuel level and displays it on a 15-segment bar-graph display. The project is Arduino-compatible and consists of ATMEGA328 controller. The resistive sensor with a divider resistor is connected to Analog pin A0 of the MCU chip. The 15 LEDs of different colors are connected to various Arduino pins.

Arduino Code

Arduino code is available to test the project. Burn the bootloader and code to a new ATMEGA328 microcontroller using the onboard programming connector. Refer to the connection diagrams below.

Bootloader: https://docs.arduino.cc/retired/hacking/software/Bootloader/

Arduino Bootloader and Arduino Programming:https://docs.arduino.cc/built-in-examples/arduino-isp/ArduinoToBreadboard/

Sensor

A resistive sensor is used to measure the fuel level. This sensor with 1kΩ divider resistor outputs analog values 785 to 984. This analog signal is connected to ADC A0 of the Arduino chip. Arduino chip evaluates input signal and controls 15LEDs. Different sensor provides different outputs. It is advisable to map the right value in Arduino code as per the sensor’s output.

Features

Power Supply 5V DC
15 Segments Bar-Graph Display
Arduino Compatible Project
Project Accommodates Any Resistive Sensor 2 Wire or 3 Wire
Multicolor LEDs Used for Easy Visualisation
On Board Connector for Bootloader and Arduino Programming
PCB Dimensions 65.41 x 18.42mm

Arduino Pins

Sensor Input Analog-0 Arduino
Arduino D3 = LED01
Arduino D4 = LED02
Arduino D5 = LED03
Arduino D6 = LED04
Arduino D7 = LED05
Arduino D8 = LED06
Arduino D9 = LED07
Arduino D10 = LED08
Arduino D11 = LED09
Arduino D12 = LED10
Arduino D13 = LED11
Arduino A1 = LED12
Arduino A2 = LED13
Arduino A3 = LED14
Arduino D2 = LED15

Connections

CN1: Programming Pin 1 = TX, Pin 2 = TX, Pin 3 = Reset, Pin 4 = GND
CN2: Programming Pin 1 = VCC, Pin 2 = D11, Pin 3 = D12, Pin 4 = D13
CN3: Pin 1 = Sensor 1, Pin 2 = Sensor 2, Pin 3 = GND No Use

Schematic

Parts List

NO.	QNTY.	REF.	DESC	MANUFACTURER	SUPPLIER	SUPPLIER PART NO
1	2	CN1,CN2	4 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5317-ND
2	1	CN3	3 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5316-ND
3	3	C1,C3,C6	0.1uf/50V CERAMIC SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
4	1	C2	10uF/10V CERAMIC SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
5	2	C4,C5	22PF/50V CERAMIC SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
6	5	D1,D2,D3,D4,D5	GREEN-LED SMD SIZE 1206	WURTH	DIGIKEY	732-4990-1-ND
7	5	D6,D7,D8,D9,D10	YELLOW-LED SMD SIZE 1206	LITE ON INC	DIGIKEY	160-1406-1-ND
8	3	D11,D12,D13	BLUE-LED SMD SIZE 1206	WURTH	DIGIKEY	732-4989-1-ND
9	2	D14,D15	RED-LED SMD SIZE 1206	WURTH	DIGIKEY	732-4991-1-ND
10	15	R1 to R15	470E - 620E 5% SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
11	1	R16	10K 5% SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
12	1	R17	DNP
13	2	R18,R20	0E SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
14	1	R19	1K 5% SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
15	1	U1	ATMEGA328TQPF-32	MICROCHIP	DIGIKEY	ATMEGA328PB-AURCT-ND
16	1	X1	16Mhz	ECS INC	DIGIKEY	X1103-ND