Elenco Snaptricity&reg - Manual (Page 52)

Snappy says: this type of switching
combination is an OR sub-circuit
(short for “this OR that”). It has its
own symbol.
OR Gate
-51-
Or Project #42
Educational Corner:
Simple switching circuits like this are the basic building blocks of
computers. Large arrays of simple sub-circuits like AND, NAND, OR,
and others are used to add and multiply numbers together in the heart
of advanced microprocessors. In computers, the switches used here
are transistors controlled by other parts of the computer.
Electric Paths
+
Hold down the press switch (S2), then use the slide
switches (S5) to turn the fan on or off.
Operation
If the press switch is on, then the fan will be on if either the
left
OR right slide switch is set to ON (position C) OR both
slide switches are set to ON (position C).
The same type of circuit is used throughout your home,
such as having several sensors controlling a security light.
Description
Build the circuit shown.
Assembly
!
WARNING: Moving parts. Do not
touch the fan or motor during operation.
!
WARNING: Do not
lean over the motor.
+