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 ...

[Tobie’s] part of the hack is to use an Arduino and a few buttons as the controller. It’s easy to set up and we think the breadboarded controller approximates the size and weight of an LCD ...