Turn LCD on and Off With Push Button Using Arduino

In this tutorial we are going to Turn ON or OFF the I2C LCD using a button & Arduino.

Watch the Video!

Step 1: What You Will Need

• Arduino UNO (or any other Arduino or ESP)
• LCD I2C
• 1K ohm resistors
• LED
• Button
• Jumper wires
• Breadboard
• Visuino program: Download Visuino

Step 2: Brought by PCBWay

Thank you PCBWay for supporting this tutorial and helping users learn more about electronics.

What I like about the PCBWay is that you can get 10 boards for approximately $5 which is really cost effective for professional made boards, not to mention how much time you save!

Go check them out here. They also offer a lot of other stuff in case you might need it like assembly, 3D printing, CNC machining and a lot more.

Step 3: The Circuit

Step 4: Start Visuino, and Select the Arduino UNO Board Type

The Visuino: https://www.visuino.eu also needs to be installed. Download Free version or register for a Free Trial.

Start Visuino as shown in the first picture Click on the “Tools” button on the Arduino component (Picture 1) in Visuino When the dialog appears, select “Arduino UNO” as shown on Picture 2

Step 5: In Visuino Add Components

• Add “Debounce Button” component
• Add “Toggle(T) Flip-Flop” component
• Add “Liquid Crystal Display (LCD) – I2C” component

Step 6: In Visuino Set Components

• Select “LiquidCrystalDisplay1” and in the properties window set “Columns” to 20 and “Rows” to 4

Note: if you are using a different LCD that is not 20X4 then use Columns and Rows for that LCD

• Select “LiquidCrystalDisplay1” and in the properties window select “Enabled” and click on the pin icon and select “Boolean SinkPin“
• Double click on the “LiquidCrystalDisplay1” and in the “Elements” window drag “Text Field” to the left and in the properties window set “Initial Value” to ARDUINO
• Close the “Elements” window

Step 7: In Visuino Connect Components

• Connect Arduino digital pin[4] to “Button1” pin [In]
• Connect “Button1” pin [Out] to “TFlipFlop1” pin [Clock]
• Connect “TFlipFlop1” pin [Out] to “LiquidCrystalDisplay1” pin [Enabled]
• Connect “LiquidCrystalDisplay1” pin I2C [Out] to Arduino pin I2C [In]

Step 8: Generate, Compile, and Upload the Arduino Code

In Visuino, at the bottom click on the “Build” Tab, make sure the correct port is selected, then click on the “Compile/Build and Upload” button.

Step 9: Play