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2. Measure how long of a wire you need to make each connection.


3. Strip off^1 ⁄ 4 " of insulation from each end.
   Better yet, buy prestripped wires.


4. Bend the bare wire at a right angle.


5. Insert the wire into a hole in the board.

The schematic shown earlier in Figure 4-6 is shown translated onto a bread-

board in Figure 4-10. You don’t see the potentiometer, microphone, battery,

switch, or speaker on the breadboard because these are connected through

wires attached to the five terminal blocks (TB). The sole purpose of a termi-

nal blockis to provide a place where you can attach wires to your circuit

board by inserting them into holes and using a screw to clamp them down.

Notice that we inserted a lead from C2 into a contact in the same row as Pin 1

of IC1, thereby making electrical contact. We ran a wire from the same row as

the other lead of C2 around IC1 to Pin 8 of IC1. This produces a lot neater

board than you get when you loop wires over the IC.

Notice also how all the wires are flat on the breadboard. We cut them all to

the length required so they didn’t have excess wire poking up in the air.

We measured the resistor leads so that we had enough length to cross the

distance between the contacts and still have about^1 ⁄ 4 " more on either side to

bend down and insert in the breadboard holes.

Stranded wire

Solid wire

Insulation Single wire

Insulation Several fine wires

Figure 4-9:
Stranded
versus solid
wire.

Chapter 4: Running Down the Skills You Need 69