Elenco Snap Circuits® Home Learning - Manual (Page 9)

Summary of Parts & Circuit Diagram Symbols
Motor (M1)
A transducer that converts electrical energy to kinetic energy
(motion).
Speaker (SP)
A transducer that converts electrical energy to sound. An
electrical signal creates mechanical vibrations, which create
variations in air pressure, which travel across the room to
your ears.
Music
Integrated Circuit
(U1)
A module that converts electrical energy to Music. It
contains a specialized sound-generation circuit with
resistors, capacitors, and transistors. The descriptions
for the music IC module is given here for those
interested, see the projects for connection examples:
Electromagnet
(M3)
with Iron Core
Rod
A coil of wire, which acts like a magnet when an electric current
flows through it. Placing an iron bar inside increases the
magnetic effects.
NPN Transistor
(Q2)
A device that switches or amplifies electrical current.
(+)
HLD
OUT (–)
TRG
Music IC:
(+) - power from batteries
(–) - power return to batteries
OUT - output connection
HLD - hold control input
TRG - trigger control input
Music for ~20 sec on power-up, then hold HLD to (+) power
or touch TRG to (+) power to resume music.
Music IC
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