Elenco Deluxe Snap Rover® - Manual (Page 6)

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About Your Snap Circuits ® Parts (continued)
The Sound & Recording IC (U9) module contains an integrated
recording circuit, a dual timer integrated circuit for making audio
tones, microphone, speaker, filtering circuitry, and other supporting
components. It includes resistors (adjustable and fixed), capacitors,
transistors and diodes that are needed to make the recordings and
play all the sounds. Recording time is up to 12 seconds. A
description for this module is given here for those interested, see
Project #1 for a connection example and for instructions on how to
use it:
The motors (in the Rover body) convert elecricity into mechanical
motion. Electricity is closely related to magnetism, and an electric
current flowing in a wire has a magnetic field similar to that of a
very, very tiny magnet. Inside the motor is a coil of wire with many
loops wrapped around metal plates. If a large electric current flows
through the loops, it will turn ordinary metal into a magnet. The
motor shell also has a magnet on it. When electricity flows through
the coil, it magnetizes the metal plates and they repel from the
magnet on the motor shell - spinning the shaft. A small gear is on
the end of the shaft and spins with it.
The Disc Launcher (DL) contains two motors. One motor starts
first and spins a cylinder at high speed. Another motor starts a few
seconds later and slowly moves a disc into launch position using
gears and a hook. When the disc enters launch position the
cylinder grabs it and propels it out of the launcher. The motors are
controlled by an integrated circuit along with resistors, capacitors,
and transistors. The same circuit also controls the lights in the
“eyes”. A description for this module is given here for those
interested, see Project #1 for a connection example:
Sound & Recording IC:
(+) - power from batteries
(–) - power return to batteries
REC - recording control
TRG - main tone activation/disable
SP - external speaker control
PLAY - play recording
2TC - modulating tone control
2TT - modulating tone activation/disable
2TO - modulating tone output
CONT - main tone control
Knobs: upper controls modulating tone
lower controls main tone
frequency
Red light: this is a recording indicator
(–)
(+)
2TC
SP
PLAY
2TT
2TO
CONT
REC
TRG
!
Only connect this
part as shown in
the projects!
Rover Rear:
(+) - power from batteries
(–) - power return to batteries
L+ - left forward motor drive
L – - left backward motor drive
R+ - right forward motor drive
R – - right backward motor drive
N1, N2 - not used
N1
ROVER REAR
R– L– (+)
N2 R+ L+ (–)
!
Only connect this part as
shown in the projects!
Disc Launcher:
(+) - power from
batteries
(–) - power return to
batteries
CONT - control
input (active low)
EXT - external
device control
(active low)
EXT
CONT
(+)
(–)
!
Only connect this part as
shown in the projects!