April 1972 Popular Electronics
Table of Contents
Wax nostalgic about and learn from the history of early electronics. See articles
published October 1954 - April 1985. All copyrights are hereby acknowledged.
Robert Balin created many quizzes
for Popular Electronics over his years with the magazine. This one challenges your ability
to trace out connections without getting confused by crossovers - which is easy to do. Each
of the six-position switches illuminate a different combination of lamps. Your job, if you
accept it, is to figure out which lamps light for positions 1 through 6. A big list of electronics
quizzes is posted near the bottom.
Ganged Switching Quiz
By Robert P. Balin
Electronics hobbyists, especially troubleshooters,
can always use some practice in tracing out circuits that include ganged switches. Unless
you are careful and systematic, it is easy to get confused, lose your way or overlook a component.
Here's a chance to practice this important skill.
The schematic at left contains a 6-position, 3-pole switch, six 6-volt lamps and 6- and
12-volt batteries. As the switch is rotated, determine what combinations of lamps will light
- each to full brightness. The answers are below so cover them up while you work out the circuit.
Note that although the switching function which this circuit performs can be done by a
much simpler circuit (a single 6-volt battery can do the job) such a circuit would be too
simple to be challenging and only unnecessary schematic zig-zagging could make it look more
complicated. Since this quiz is intended to be a training problem, practical considerations
have been ignored.
Popular Electronics published many quizzes over the years - some
really simple and others not so simple. Robert Balin created many of the quizzes. This is
a listing of all I have posted thus far.
- Test Your
Knowledge of Semiconductors, August 1972
- Ganged Switching Quiz,
- Lamp Brightness Quiz,
Lissajous Pattern Quiz, September 1963
Quizoo, October 1962
Photo Album Quiz, March 1963
Alphabet Quiz, May 1963
- Quiz: Resistive?
Inductive? or Capacitive?, October 1960
Vector-Circuit Matching Quiz, June 1970
Quiz, September 1961
- RC Circuit Quiz,
- Diode Quiz, July
Curves Quiz, February 1963
Electronic Numbers Quiz, December 1962
Conversion Quiz, April 1963
- Coil Function
Quiz, June 1962
Analogy Quiz, August 1960
- Audio Quiz,
Unit Quiz, May 1962
Circuit Quiz, June 1968
on AC Circuit Theory, December 1970
Magnetic Phenomena Quiz, February 1962
Electronics Geography Quiz, April 1970
Menu Quiz, August 1963
Noise Quiz, August 1962
Current Quiz, October 1963
- Electronic Inventors Quiz, November 1963
Function Quiz, January 1962
Measurement Quiz, January 1963
- Vacuum Tube
Quiz, February 1961
- Kool-Keeping Kwiz, June
Posted July 6, 2017