The PCF8574 is a silicon CMOS circuit provides general purpose ... Reference circuit diagram of an Arduino-compatible LCD backpack is shown below. What follows next is information on how to use one of ...

The LCD is unstable depending on how the Arduino board is reset. When connecting the Arduino to a computer the screen doesn’t work until you press the reset button. But press the reset button ...

Getting a character LCD running should be really simple. The gotcha is the logic level gap between the devices. If you’ve been working with Arduino, your add-ons are probably meant for a 5V ...