PROJECTS Electronics Fun & Fundamentals
TIME REQUIRED:
1–2 Hours
DIFFICULTY:
Easy
COST:
$5–$15
MATERIALS
» Potentiometers (3)
» Galvanometer (optional)
» Alligator jumper wires
» 9V battery
» Multimeter
HANDS-ON ANALOG
Build the world’s easiest analog computer
106 makezine.com
A dial for a potentiometer. Your dial design should
be customized to match the actual rotation range
of each potentiometer.
Deluxe version of EASY analog computing device, with
solid wood case, textured ABS faceplate, and optional
galvanometer. Shown multiplying 0.3 by 0.7.
A minimal analog circuit for multiplying two numbers.
General Electric, Charles Platt, Nuts & Volts Magazine
C
Volt
meter
If you use
a galvanometer,
insert a 100K resistor
each side to protect it.
VA VB
1K
DC voltage from 3V to 9V.
100K 100K
A
B
C
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
D
F
G
A
B
C
The analog circuit
can be built
quickly from
jumper wires.
E
M83_104-7_EFF_F1.indd 106M83_104-7_EFF_F1.indd 106 10/11/22 10:44 AM10/11/22 10:44 AM
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