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 ...

Normally driving an LCD requires seven connections to pins on the display, but by using a shift register, [Phillip Warner] at Arduino Playground was able to drive an LCD using only 3 wires.

Assume that you are moving towards a complex microcontroller project bundled with blinkers, beepers, and a display panel ... Reference circuit diagram of an Arduino-compatible LCD backpack is shown ...

The image shown below indicates the basic wiring diagram of the current limiting resistors and driver transistors. Next is the Hookup diagram of the Arduino 4-Digit 7-segment LED Display, followed by ...

I made the two soil probes using 5/16 x 2-inch full-thread steel bolts, 20-gauge wire ... I connected the LCD display according to a slightly modified design of Arduino's tutorial, with LCD ...