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

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CHAPTER 9

Person Counter

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This project uses an ultrasonic range finder and an LED display module to count people moving past the range finder and display the number (Figure 9-1).

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FIGURE 9-1 Person counter.

 

Parts

This project uses a Protoshield and an 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:

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Protoshield Layout

Figure 9-2 shows the ...

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