Arduino - Button - Pump

We are going to learn how to use Arduino to turn on a pump several seconds and then turn off when a button is pressed.

Hardware Required

1×Arduino UNO or Genuino UNO
1×USB 2.0 cable type A/B
1×Push Button
1×(Optional) Panel-mount Push Button
1×12V Pump
1×Vinyl Tube
1×12V Power Adapter
1×DC Power Jack
1×Jumper Wires
1×(Optional) 9V Power Adapter for Arduino
1×(Recommended) Screw Terminal Block Shield for Arduino Uno
1×(Optional) Transparent Acrylic Enclosure For Arduino Uno

Or you can buy the following sensor kits:

1×DIYables Sensor Kit (30 sensors/displays)
1×DIYables Sensor Kit (18 sensors/displays)
Please note: These are Amazon affiliate links. If you buy the components through these links, We will get a commission at no extra cost to you. We appreciate it.

About Button and Pump

If you do not know about pump and button (pinout, how it works, how to program ...), learn about them in the following tutorials:

Wiring Diagram

Arduino Button controls Pump Wiring Diagram

This image is created using Fritzing. Click to enlarge image

Arduino Code

/* * Created by * * This example code is in the public domain * * Tutorial page: */ #include <ezButton.h> // include ezButton library #include <ezOutput.h> // include ezOutput library ezOutput pump(A5); // create ezOutput object attached to pin A5 ezButton button(12); // create ezButton object attached to pin 12 void setup() { Serial.begin(9600); button.setDebounceTime(50); // set debounce time to 50 milliseconds pump.low(); // turn pump off } void loop() { pump.loop(); // MUST call the loop() function first button.loop(); // MUST call the loop() function first if (button.isPressed()) { Serial.println("Pump is started"); pump.low(); pump.pulse(10000); // turn on for 10000 milliseconds ~ 10 seconds // after 10 seconds, pump will be turned off by pump.loop() function } }


The above code does:

Quick Steps

  • Connect Arduino to PC via USB cable
  • Open Arduino IDE, select the right board and port
  • Navigate to the Libraries icon on the left bar of the Arduino IDE.
  • Search “ezButton”, then find the button library by ArduinoGetStarted
  • Click Install button to install ezButton library.
Arduino button library
  • Search “ezOutput”, then find the output library by ArduinoGetStarted
  • Click Install button to install ezOutput library.
Arduino output library
  • Copy the above code and open with Arduino IDE
  • Click Upload button on Arduino IDE to upload code to Arduino
Arduino IDE Upload Code
  • Press the button
  • See the pump's state

Code Explanation

Read the line-by-line explanation in comment lines of source code!

Video Tutorial

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The Best Arduino Starter Kit