4a. Grab the LM386 audio amplifier
IC. Locate the notch and dot. The
pins on the IC are numbered starting
counterclockwise from the dot, as in
the facing illustration. Using a perf
board designed with standard IC
and component spacing, place the
IC in the center of the perf board.
Designate a row for power (+) and
a row for ground (–) by marking the
assigned holes.
4b. Using jumper wire, connect pin 6
to power, pin 4 to ground, and pin 2
to ground.
4c. From pin 5, a 0.05μF capacitor
must connect to a 10Ω resistor, which
then has to be grounded. Also from
pin 5, a 220μF capacitor must be
connected. Connect a wire from pin
5 and jump it 2 rows over (red wire).
Connect 1 lead of the 0.05μF capacitor to that row and the other lead 2
rows over. To hold the capacitor temporarily in place, bend the leads flush
to the bottom of the board. Connect 1
lead of the resistor to the second lead
of the 0.05μF capacitor, and the second lead of the resistor to a separate
row. Using jumper wire, connect the
second lead of the resistor to ground.
4d. Connect another wire from pin
5 and jump it 3 rows over (yellow
wire). Connect the positive lead of the
220μF capacitor (the lead without the
black band) to that row, and connect
its other lead 2 rows over.
