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

The steps involved in making Sensitive Sam sensitive are

1. Making the transmitter circuit and fitting it into your remote control box


2. Making the receiver circuit that goes into Sam


3. Putting together the chassis that contains the receiver circuit (Sam’s body)

Making the transmitter circuit and remote control box................

The transmitter circuit fits into a remote control box and allows you to turn

Sam on and off, speed him up or slow him down, and sound his horn. Here’s

what’s involved in making this circuit:

1. Place HT12E (IC1) and five terminal blocks on the breadboard, as
   shown in Figure 13-7.
   The five terminal blocks shows in this figure will be used to connect two
   wires each to various components in the circuit. The wires from these ter-
   minal blocks will go to the battery pack, the on/off switch, the transmit
   switch, and the three toggle switches.

Figure 13-7:

Place the IC

and terminal

blocks

on the

breadboard.

Chapter 13: Sensitive Sam Walks the Line 313