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Here are the types of activities you’ll be doing to build the metal detector.

You will

1. Build a pretty simple electronic circuit containing a coil, a proximity
   detector IC, a transistor, a couple of resistors, and an LED.


2. Install the circuit in a box with batteries and an on/off switch.


3. Mount the box on a handle made from plastic pipe.

Scoping Out the Schematic .........................................................................

This project is really easy. You have only one breadboard to put together for

this project. You can see the schematic for the board in Figure 12-2.

Figure 12-1:

Our

handheld

metal

detector.

Part IV: Good Vibrations............................................