If you are looking for the Chapter 12 content for the 1st Edition of Exploring Arduino, please click here.

Interfacing with Liquid Crystal Displays

Parts List

• Arduino Uno or Adafruit METRO 328
• USB cable (Type A to B for Uno, Type A to Micro-B for METRO)
• Half-size or full-size breadboard
• Assorted jumper wires
• Pushbuttons (×2)
• 220Ω resistor
• 1kΩ resistor
• 4.7kΩ resistors (×2)
• 10kΩ resistors (×2)
• 10kΩ trim potentiometer (might be included with LCD purchase)
• 9V battery
• 9V battery clip
• L7805CV 5V voltage regulator
• 10μF 50V electrolytic capacitors (×2)
• 1N4001 diode
• PN2222 NPN bipolar junction transistor (BJT)
• 8Ω loudspeaker
• TC74A0-5.0VAT I2C temperature sensor
• Miniature 5V DC brushless cooling fan
• 16×2 character LCD with header pins

Code

Download Code (2nd Edition, Chapter 12)
(Also available on GitHub)

Useful Links

• Arduino LiquidCrystal Library Reference
• TC74 Datasheet (PDF)

Videos

Watch a tutorial video about interfacing LCDs to an Arduino:

Watch a demo video of the “LCD Progress Bar” project from this chapter:

Watch a demo video of the “Personal Thermostat” project from this chapter: