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Here are the types of activities you’ll be doing to create your own radio.

You will

1. Put together an electronic circuit containing a coil and variable capaci-
   tor that you use to tune to your favorite stations, an IC that separates
   the voice signal from the radio frequency carrier and an IC that amplifies
   the voice signal enough to power a speaker.


2. Install the circuit, speaker, on/off switch, volume control, and tuner in a
   handy box.

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

Imagine all that music and talk floating around out there in the air. Time to

get to work on a circuit that lets you capture those sounds and pump them

through a speaker. There is only one breadboard to put together for this pro-

ject. You can see the schematic for the board in Figure 8-2.

Figure 8-1:

Painted a

shiny silver,

we think our

radio is

cool.

166 Part II: Sounding Off!