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I’m using the lc1602 display. https://www.waveshare.com/datasheet/LCD_en_PDF/LCD1602.pdf
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I’m using the code from the hello word example but I have commented out the lines about the printing in void loop to troubleshoot. What I'm following.
/*
LiquidCrystal Library - Hello World
Demonstrates the use a 16x2 LCD display. The LiquidCrystal
library works with all LCD displays that are compatible with the
Hitachi HD44780 driver. There are many of them out there, and you
can usually tell them by the 16-pin interface.
This sketch prints "Hello World!" to the LCD
and shows the time.
The circuit:
* LCD RS pin to digital pin 12
* LCD Enable pin to digital pin 11
* LCD D4 pin to digital pin 5
* LCD D5 pin to digital pin 4
* LCD D6 pin to digital pin 3
* LCD D7 pin to digital pin 2
* LCD R/W pin to ground
* LCD VSS pin to ground
* LCD VCC pin to 5V
* 10K resistor:
* ends to +5V and ground
* wiper to LCD VO pin (pin 3)
Library originally added 18 Apr 2008
by David A. Mellis
library modified 5 Jul 2009
by Limor Fried (http://www.ladyada.net)
example added 9 Jul 2009
by Tom Igoe
modified 22 Nov 2010
by Tom Igoe
modified 7 Nov 2016
by Arturo Guadalupi
This example code is in the public domain.
https://docs.arduino.cc/learn/electronics/lcd-displays
*/
// include the library code:
#include <LiquidCrystal.h>
// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("hello, world!");
}
void loop() {
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
//lcd.setCursor(0, 1);
// print the number of seconds since reset:
//lcd.print(millis() / 1000);
}
- I’m using the wiring shown in this picture but my potentiometer is not connected to +5v (when I connect it something goes wrong and I can’t control the contrast)
I’m sorry if my wiring is too messy.
- I’m currently just trying to print “Hello World”. When I play with potentiometer I go from seeing nothing to seeing only boxes. At no point do I see any text.
I’m sharing a link to a video where I show that. It will probably be down in 2 days so sorry for that. Watch PXL_20251031_180535595 | Streamable
Additional Question:
I have an hd44780 lcd display too. Is there some good tutorial you would recommend I follow for this particular display?
