Arduino shields are boards that can be plugged on top of the Arduino PCB to extend its capabilities. This makes prototyping with Arduino plug and play. Instead of soldering or wiring external devices or sensors, you can simply hook your board with a shield. This is another practical tutorial, we're gonna build a fully working complete Arduino LCD Keypad shield, we're gonna go through all the steps, we'll start from scratch explaining and simulating the circuit diagram in Proteus, then we're gonna create a Printed circuit Board with Eagle but any PCB design software can also be used, then we're gonna generate the manufacturing files to manufacture the PCB with PCBWay our favorite low cost PCB manufacturing company and finally were're gonna test the operation of the shield with a simple Arduino sketch.