This document summarizes a student project to measure water level in a tank using an ultrasonic sensor. The project aims to understand ultrasonic sensors and complete an instrumentation task. An Arduino UNO microcontroller is used along with an HC-SR04 ultrasonic sensor, LCD display, LEDs, buzzer, and other components. The ultrasonic sensor measures the water level and the system triggers alarms and valve control when the water reaches certain levels. The document provides details on the components, working principles, program, costs, and acknowledges supervisors for their support of the project.

1. Arduino Water level tank with Ultrasonic sensor
By:
Andzany Putri Yuslianata
Arip Rahman Hakim
Moch. Bagas Hermansyah
Refrigeration and Air Conditioning Departement
Bandung State of Polytechnic
2016

2. Water is the driving force of all nature
- Leonardo da Vinci

4. “Measuring water level with ultrasonic sensor by vonPongrac”
Go Check :
http://www.instructables.com/id/Measuring-
water-level-with-ultrasonic-sensor/

6. What are the Purpose
of this project?
1. To complete instrumentation subjects tasks
2. To know and understand the principle of Ultrasonic
sensor
3. To know the spesification of Ultrasonic, and make a
program for this project.

7. What kind of tools are used ?

8. Microcontroller ATmega328P
Operating Voltage 5V
Input Voltage (recommended) 7-12V
Input Voltage (limit) 6-20V
Digital I/O Pins 14 (of which 6 provide PWM output)
PWM Digital I/O Pins 6
Analog Input Pins 6
DC Current per I/O Pin 20 mA
DC Current for 3.3V Pin 50 mA
Flash Memory
32 KB (ATmega328P)
of which 0.5 KB used by bootloader
SRAM 2 KB (ATmega328P)
EEPROM 1 KB (ATmega328P)
Clock Speed 16 MHz
Length 68.6 mm
Width 53.4 mm
Weight 25 g
The Uno is a microcontroller board
based on the Atmega328P. It has 14
digital input/output pins (of which 6 can
be used as PWM outputs), 6 analog
inputs, a 16 MHz quartz crystal, a USB
connection, a power jack, an ICSP
header and a reset button. It contains
everything needed to support the
microcontroller; simply connect it to a
computer with a USB cable or power it
with a AC-to-DC adapter or battery to
get started.. You can tinker with your
UNO without worrying too much about
doing something wrong, worst case
scenario you can replace the chip for a
few dollars and start over again.
https://www.arduino.cc/en/Main/ArduinoBoardUno
Arduino UNO

9. •Working Voltage: DC 5V
•Working Current: 15mA
•Working Frequency: 40Hz
•Max Range: 4m
•Min Range: 2cm
•Measuring Angle: 15 degree
•Trigger Input Signal: 10µS TTL pulse
•Echo Output Signal Input TTL lever signal and the range in proportion
•Dimension 45 * 20 * 15mm
“HC-SR04 is an ultrasonic ranging module that
provides 2 cm to 400 cm non-contact
measurement function. The ranging accuracy
can reach to 3mm and effectual angle is < 15°. It
can be powered from a 5V power supply.”
http://www.electroschematics.com/8902/hc-sr04-datasheet/
Ultrasonic sensor HC-SR04

10.  Material : AlGaInP
 Forward voltage : 2,1V @ If=20mA
 Angle : 40 degree
• Lumination : 200mCd @ If=20mA
LED (Light Emitting Diode)

11. Pump

12. LCD
Buzzer PowerBank
PCB
Resistor

13. How much do you need?

14. Component Quantity Cost
Arduino Uno 1 Rp.150.000
Ultrasonic 1 Rp. 35.000
LCD 1 Rp. 35.000
LED 5 Rp. 2.500
Resistor 4 Rp. 1.000
Buzzer 1 Rp. 5.000
PCB 1 Rp. 7.000
Cable - -
Pipe 1 Free
Acrilic 30x30 cm Free
Powerbank 1
Total Cost : IDR 285.000
Pump 1 Rp. 50.000

15. Working principles
The working principles of this project is so simple, when the water has reached the
set point, then the red LED will ON and the buzzer will beeping and then the valve
should be open for water to be recirculated. When the water is at a safe limit , the
Green LED will ON , buzzer stops beeping and the valve should be close. Having
close the pump will circulated water into the tank.

17. How about the
program ?

20. Thanks For Your Attention...
Thanks To Allah SWT.....
Our best supervisor Mr. Ismail Wellid and other Supervisor in
this subject