Introduction: Using LCD With a Piezo Speaker (Christmas Theme)
This circuit consists of a LCD and a piezo speaker and
The LCD will display “Merry Christmas ! and Happy New year ."
The piezo speaker will play "Silent Night ".
This will be accomplished with Arduino and a Code .
The potentiomenter(10 k) will control the brightness of the LCD.
Step 1: Electronic Parts Used in the Circuit
Parts used in the circuit;
220 resistor(red,red ,brown)
Step 2: LCD 16x2 ;brief Description
LCD means liquid crystal display .It has a microcontroller
in it (See image 1 or 2)
The LCD display controller takes commands from another microcontroller (like Arduino ) to
drive the display . It can display letters or numbers .
It is called 16x2 since it has 16 columns and 2 rows .It has has (16x2) or 32 characters total.
Each character will have a 5x8 Pixel dots . The pixels will light up with electricity and when the Code allow them to.
When you adjust the brightness of the LCD with the 10 k potentiometer you can see the squares and very tiny squares(pixels)
Step 3: The Piezo Speaker
The piezo speaker consists of a piezo crystal between 2
crystals .If you apply voltage across the crystals they will push one conductor and pull on the other .This action of pushing and pulling produces sound .(see image of piezo)
The Code is read by Arduino and produces notes for the song” Silent Night”.The song is heard from the piezo speaker .
Step 4: Setting Up the Circuit
Pin 1 VSS ------ Ground on breadboard
Pin 2 VDD ----- applied to positive breadboard rail
Pin 3 ----------------Lead from potentiometer (variable);see circuit-middle lead
Pin 4----------------Connect to Arduino digital 12
Pin 5----------------Connect to ground
Pin 6 (enable)-------------Connect to Arduino digital 11
Pin 11---------Connect to Arduino digital pin 5
Pin 12----------Connect to Arduino digital pin 4
Pin 13----------Connect to Arduino digital pin 3
Pin 14---------Connect to Arduino digital pin 2
Pin 15-----------Connect to a 220 ohm resistor and then to positive rail (5 volts)
Pin16---------Connect to ground
Connect the 10k potetiometer as shown in the image
Piezo speaker connect positive lead to Arduino digital pin 9
Piezo speaker connect negative lead to ground on digital side .
Connect Arduino 5 volts to positive breadboard and ground to negative bread
Step 5: Conclusion
This project shows how you can use a LCD to display "Merry Christmas and Happy New year ."
Also you can use a piezo speaker to play "Silent Night " with Arduino and Code
The second image is the Code for the LCD and piezo speaker .
This project was created on Tinkercad .It was tested and works .
I enjoyed this project .I hope it helps you understand LCD and piezo speakers and how the can be incorporated in a circuit with a Code .