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 ...

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 ...

[Usmar A. Padow] put together an Arduino Uno, SD card, four line character LCD, and PS/2 keyboard. but he’s also included alternative options to go without an LCD screen by using a computer ...