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Taking Things Step by Step.........................................................................

If you have one, now’s the time to put on your official Marconi Was Here

T-shirt so you can set out to build your AM radio in style. Building a radio

involves creating the circuit; drilling various holes in a box; placing the cir-

cuit, speaker, and knobs in the box; and tuning to find available frequencies.

Building a radio circuit ......................................................................

The first step in building a radio is to tackle the circuit that forms its elec-

tronic brains. Here are the steps involved:

1. Place ZN416E (IC1), LM386N-1 (IC2), and seven terminal blocks on the
   breadboard, as shown in Figure 8-5.
   The seven terminal blocks shown in this figure will be used to connect
   two wires each to various components in the circuit. The wires from
   these terminal blocks go to the battery pack for IC1, the battery pack for
   IC2, the on/off switch, the coil, the variable capacitor, the speaker, and
   the potentiometer.

IC 2 IC 1

Figure 8-5:

Place the

ICs and

terminal

blocks

on the

breadboard.

172 Part II: Sounding Off!