Circuit Documentation

Summary

This circuit integrates an Arduino Nano microcontroller with an ST7735 128x128 1.44" TFT I2C Color display and multiple pushbuttons. The display is controlled via SPI communication, and the pushbuttons are interfaced with the digital and analog input pins of the Arduino Nano. The circuit is designed to capture user inputs through the pushbuttons and display relevant information on the TFT screen.

Component List

Arduino Nano

• Microcontroller board based on the ATmega328P
• Offers a variety of digital and analog I/O pins
• Supports I2C, SPI, and serial communication

ST7735 128x128 1.44" TFT I2C Color

• Small form factor color display
• 128x128 pixel resolution
• Communicates with the microcontroller via SPI

Pushbuttons

• Momentary tactile switches
• Used to capture user inputs
• Connected to various digital and analog pins on the Arduino Nano

Comments

• Non-electrical components used for annotation and documentation purposes within the circuit design

Wiring Details

Arduino Nano

• 3V3 connected to ST7735 BL (Backlight)
• D10 connected to ST7735 C5
• D8 connected to ST7735 DC (Data/Command select)
• D9 connected to ST7735 RES (Reset)
• D11/MOSI connected to ST7735 SDA (Serial Data)
• D13/SCK connected to ST7735 SCL (Serial Clock)
• GND connected to ST7735 GND and all pushbutton Pin 1
• 5V connected to ST7735 VCC
• D2, D3, D4, D5, D6, D7, A2, A1, A0 connected to corresponding pushbutton Pin 2

ST7735 128x128 1.44" TFT I2C Color

• BL connected to Arduino Nano 3V3
• C5 connected to Arduino Nano D10
• DC connected to Arduino Nano D8
• RES connected to Arduino Nano D9
• SDA connected to Arduino Nano D11/MOSI
• SCL connected to Arduino Nano D13/SCK
• GND connected to Arduino Nano GND
• VCC connected to Arduino Nano 5V

Pushbuttons

• Pin 2 of each pushbutton connected to a unique digital or analog pin on the Arduino Nano (D2, D3, D4, D5, D6, D7, A2, A1, A0)
• Pin 1 of all pushbuttons connected to Arduino Nano GND

Documented Code

Arduino Nano Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Notes (documentation.txt)

No additional code documentation provided.