Arduino: Movable Shape LCD Test

Example Video

Excuse the wire management, not exactly Ben Eater's wiring

https://www.youtube.com/watch?v=ltrEcaeusLk

Content

• 1 Purpose
• 2 Plan
• 3 Getting Started
  • 3.1 Prequisites
  • 3.2 Set-up
    • 3.2.1 Nano to Breadboard
    • 3.2.2 Buttons
    • 3.2.3 Joystick
    • 3.2.4 LCD Display
    • 3.2.5 Potentiometer
• 4 Built With
• 5 Notes
• 6 Authors

1 Purpose

This project was made due to me having some sensors spare and I wanted to exercise my coding skills with an Arduino again.

2 Plan

• Have a shape on the LCD
• Able to control the shape with a joystick
• Able to size the shape with a potentiometer
• Able to alter the shape with a button

3 Getting Started

3.1 Prequisites

• 1 Arduino Nano
• 1 Standard Arduino Joystick Module
• 1 Potentiometer
• 1 AZDelivery 1.8 inch SPI TFT ST7735 LCD
• 2 Buttons
• 2 10k Resistors
• N Jumper Cables

3.2 Set-up

3.2.1 Nano to Breadboard

• Nano plugged into board
• GND to GND rail
• 5V to VCC rail

3.2.2 Buttons

• HIGH to VCC rail
• LOW to 10k resistor, which is to the GND rail
• "Colour Change" pin to D2
• " Fill" pin to D3

3.2.3 Joystick

• VCC to VCC rail
• GND to GND rail
• "X" pin to A1
• "Y" pin to A2
• "Switch" pin to D7

3.2.4 LCD Display

• VCC to VCC rail
• GND to GND rail
• "LED" pin to 3V3
• "SCK" pin to D13 (Nano's SCK pin)
• "SDA" pin to D11 (Nano's MOSI pin)
• "A0" pin to D10
• "RESET" pin to D9
• "CS" pin to D8

3.2.5 Potentiometer

• VCC to VCC rail
• GND to GND rail
• "Feedback" pin to A7

4 Built With

This code was built in VS Code with the PlatformIO extension

5 Notes

• The supply voltage is 5.0V while the LED voltage is 3.3V
• The flickering effect is caused by processor speed limitations, since the processor cannot run fast enough to "hide" the elements being drawn one at a time, an improvement would be to make a second buffer however I do not own the hardware for that improvement.

6 Authors

James Hayward - Sole Author