LCDShiftView

LCDShiftView is an Arduino library that allows you to control standard HD44780-based LCD displays using a single 74HC595 shift register. This helps you save precious I/O pins and gives you full flexibility to define which shift register outputs are connected to which LCD pins.

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Features

• Control LCD (16x2, 20x4...) via shift register (74HC595).
• Define any pin mapping from the shift register (Q0–Q6) to LCD pins.
• Default mapping is:
  • RS → Q0
  • E → Q1
  • D4 → Q2
  • D5 → Q3
  • D6 → Q4
  • D7 → Q5
• Built-in support for:
  • Custom characters.
  • Different LCD sizes.
  • Clear and easy API similar to LiquidCrystal.

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Installation

Via Library Manager

1. Open Arduino IDE.
2. Go to Sketch → Include Library → Manage Libraries.
3. Search for LCDShiftView.
4. Click Install.

Manual Installation

1. Download the library from GitHub:
   https://github.com/Martin4017/LCDShiftView/releases/tag/1.0.1
2. Extract the .zip file.
3. Move the folder to Documents/Arduino/libraries/.

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Wiring Example

LCD Pin	Connected to Shift Register Pin
RS	Q0
E	Q1
D4	Q2
D5	Q4
D6	Q5
D7	Q6
A	Q8 (Backlight pin (Optional))

Shift register inputs:

• SER (data) → Arduino pin 12
• SRCLK (clock) → Arduino pin 11
• RCLK (latch) → Arduino pin 10

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Quick Start Example

#include <LCDShiftView.h>

// Shift Register Pins: data, clock, latch
LCDShiftView lcd(2, 3, 4); 

void setup() {
  lcd.begin(16, 2);       // Set LCD size (columns, rows)
  lcd.print("Hello, World!");
}

void loop() {}

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Custom Pin Mapping (Optional)

If your LCD is wired differently, use setPins():

lcd.setPins(0, 1, 2, 3, 4, 5);
// RS, E, D4, D5, D6, D7 (Q0–Q6 are valid) Q7 is Backlight pin. "cannot be change"

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Custom Characters Example

#include <LCDShiftView.h>

byte smiley[8] = {
  B00000,
  B01010,
  B01010,
  B00000,
  B00000,
  B10001,
  B01110,
  B00000
};

void setup() {
  lcd.begin(16, 2);
  lcd.createChar(0, smiley);
  lcd.setCursor(0, 0);
  lcd.write(byte(0));
}

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Example Sketches

The library comes with example sketches to help you get started. You can find them under:

File → Examples → LCDShiftView

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License

This library is released under the MIT License.
Feel free to use, modify, and distribute.

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Author

Made by Martin4017