The TAB Book of Arduino Projects: 36 Things to Make with Shields and Proto Shields

CHAPTER 6

Keypad Door Lock

This project is very similar to the preceding project. However, instead of using a radiofrequency identification (RFID) tag reader, this version of the lock uses a traditional keypad (Figure 6-1).

FIGURE 6-1 Keypad door lock.

 

Parts

This project uses a Protoshield and a red-green-blue (RGB) LED to indicate status and a power MOSFET transistor to switch the 12 V needed by the door latch.

To build this project, you will need the following:

 

Protoshield Layout

Figure 6-2 shows the Protoshield layout for this project. ...