Author: Challanger524

20-lcd_1602_16x2/20-lcd_1602_16x2.ino

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+// 16x2 LCD (without I2C mdule) in 4-Wire Mode
+
+// https://www.instructables.com/Arduino-Interfacing-With-LCD-Without-Potentiometer
+// https://circuitdigest.com/article/16x2-lcd-display-module-pinout-datasheet
+
+#include <LiquidCrystal.h>  // https://www.arduino.cc/reference/en/libraries/liquidcrystal
+
+constexpr uint8_t V0 = 6;   // Contrast // LCD voltage bias signal
+constexpr uint8_t RS = 12;  // Toggles between Data/Command Register
+constexpr uint8_t E  = 11;  // Enable // Must be held high to perform Read/Write Operation
+constexpr uint8_t D4 = 5;   // Data/Command Pin // Pins used to send Command or Data to the LCD // In 4-Wire Mode only 4 pins are connected to MCU
+constexpr uint8_t D5 = 4;   // Data/Command Pin // Pins used to send Command or Data to the LCD // In 4-Wire Mode only 4 pins are connected to MCU
+constexpr uint8_t D6 = 3;   // Data/Command Pin // Pins used to send Command or Data to the LCD // In 4-Wire Mode only 4 pins are connected to MCU
+constexpr uint8_t D7 = 2;   // Data/Command Pin // Pins used to send Command or Data to the LCD // In 4-Wire Mode only 4 pins are connected to MCU
+constexpr uint8_t A  = 10;  // Backlight PWM pin
+
+LiquidCrystal lcd(RS, E, D4, D5, D6, D7); // 4-Wire Mode
+
+void setup() {
+  constexpr uint8_t contrast = 60;
+  constexpr uint8_t brightness = 100; // of the backlight
+
+  analogWrite(V0, contrast);
+  analogWrite(A, brightness);
+
+  lcd.begin(16, 2); // `columns`, `rows`
+
+  lcd.setCursor(0, 0); lcd.print("   Daniil       ");
+  lcd.setCursor(0, 1); lcd.print("  Semenenko     ");
+  // LCD display scroll borders: [ {_________...}3]
+}
+
+
+void loop() {
+  constexpr uint64_t interval = 800; // miliseconds
+  constexpr int shift = 3;           // columns
+
+  for (int i = 0; i < shift; i++) {
+    lcd.scrollDisplayRight();
+    delay(interval);
+  }
+  delay(interval);
+
+  for (int i = 0; i < shift; i++) {
+    lcd.scrollDisplayLeft();
+    delay(interval);
+  }
+  delay(interval);
+}

20-lcd_1602_16x2/lcd_1602.webp

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+![](lcd_1602.webp)
+
+https://forum.arduino.cc/t/how-to-control-lcd-backlight/684719/11