As the polarization changes in response to the applied voltage across the glass plates, more or less light is able to pass through the polarized filter on the face of the LCD. The general purpose 16×2 ...

Plug the RFID module into the breadboard with enough space around it. Connect the VCC pin to the Arduino's 3.3V (not 5V), and ...

Reference circuit diagram of an Arduino-compatible LCD backpack is shown below. What follows next is information on how to use one of these inexpensive backpacks to interface with a microcontroller in ...

Remember those LCD games that became quite ... of the hardware has been built into a web interface. [Tobie’s] part of the hack is to use an Arduino and a few buttons as the controller.