1. SET UP YOUR BREADBOARD
We’re going to build the circuit in two parts. First,
let’s build the base by setting up your breadboard
Place your two 555 chips in the center of the
board, so that they straddle the center channel
(Figure
F
). This ensures that the chip’s pins — its
metal legs — aren’t connected to each other.
It’s also important to keep in mind the
orientation of the chips so that you know you’re
connecting the right pins. Check the top of the
chip for a dot in the corner or a half-circle notch
on the end. Make sure the two chips are facing
the same way. As oriented here, with the dot or
notch on the left, pin 1 is the bottom left pin, with
numbers going across the bottom, left to right,
and then reverse across the top, as indicated in
the schematic diagram, Figure
G
on the following
page
. Confusing, but at least they’re all the same!
If your breadboard has two power rails, marked
with + and – symbols, at both the top and bottom,
it’s good to connect these using blue and red
Forrest Mims, Kaustic Machines
Build your Fruit-
Controlled Atari
Punk Circuit
TIME REQUIRED:
1–2 Hours
DIFFICULTY:
Easy
COST:
$20–$30
MATERIALS
» Solderless breadboard
» Jumper wires, male-male
» 555 timer IC chips (3)
» Resistors: 1k
Ω
(1) and 4.7k
Ω
(2)
» Capacitors: 0.1µF (1), 0.01µF (1), and 10µF (1)
» Potentiometers, 500k
Ω
(2)
» Speaker, 8
Ω
or 4
Ω
» 9V battery snap with wire leads
» 9V battery
» Fruits of your choice (2)
TOOLS
» Multimeter (optional)
F
85
make.co
M85_082-87_SquishyTech_F1.indd 85M85_082-87_SquishyTech_F1.indd 85 4/10/23 1:13 PM4/10/23 1:13 PM
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