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LCD Connection to I2C Module

LCD Connection to I2C Module

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SKU: 000175
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With this module it is very easy to convert all pins of an LCD screen of 16*2 or 20*4 characters into a compact I2C connection.

Equipped with a header and jumper for On/Off, a potentiometer for contrast and the option to set the I2C address. (with A0, A1 and A2)


  • Voltage: 5V DC
  • Default I2C address: 0x27 (PCF8574 (T)) or 0x3F (PCF8574A (T)) (delivery of chip type is random!)

See the pictures for the assembly, this is compatible with almost all 16*2 and 20*4 character LCD screens.

How do you get this module working:

  1. Install the "hd44780" library via the Arduino IDE or this github page: duinoWitchery/hd44780
  2. Connect your Arduino with the Module on the 5V/VCC, GND, SDA and SCL pins.
  3. Open the following example from the installed hd44780 library: ioClass -> hd44780_I2Cexp -> HelloWorld
  4. Change LCD_COLS to 20 and LCD_ROWS to 4 if you have a 20x4 character display.
  5. Upload it to your Arduino and you're done!

You don't see any text appearing? Then it is possible that the contrast is not set correctly. Turn the potentiometer for a correct contrast setting for your display.

5 ( 5 / 5 )
Top ding! Eventjes uitvogelen hoe het werkt, maar daarna bespaart het je een hoop moeite met aanlsuiten.
5 ( 5 / 5 )
Past direkt achter op b.v. het 20*4 karakter display. Let op: bij gebruik op een Arduino Due moet je er rekening mee houden dat de I2C van de Due niet 5V tolerant is - die mag je alleen met 3.3V aansturen. Ik heb de I2C module op 3.3V aangesloten en pin 2 (voeding naar het LCD) losgesoldeerd. Het LCD op 5V aansluiten "et voila!" het LCD draait nu perfect op de Due.

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