Snap Circuits 300-in-1 SC-300
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This deluxe Snap Circuits kit has over 60 snap-together
components that kids can use to build more than 300 electronic
devices, including a motion detector, tone generator, oscillator,
radio, and more.
This set includes everything in Snap Circuits
100, plus amplifiers,
resistors, capacitors, transistors, and much, much more. Kit
includes 2 instruction manuals showing how these components
can be used to create a wide variety of electronics projects.
This kit is so engaging that your kids can experiment and learn
on their own for hours at a time. You provide four AA batteries
and help for younger children. Ages 8 and up. Click here for larger image.
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SC-300 Kit Contents Includes:
- Clear plastic base grid
- 58 colored snap-together connectors and
electronic chips including a microphone, amplifier, capacitors,
resistors, and transistors
- 2 jumper wires
- Manual 1:
46-page guidebook
with first 101 projects
- Manual 2:
74-page guidebook
with projects 102-305
- 305 fun electronics projects total
Snap Circuits SC-300 Project
Examples
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Automatic Street Lamp
OBJECTIVE: To show how light is used to control
a street lamp.
Press the press switch (S2) on and set the adjustable
resistor (RV) so the lamp (L2) just lights. Slowly
cover the photoresistor (RP) and the lamp brightens.
If you place more light at the photoresistor the
light dims.
This is an automatic street lamp that you can turn
on by a certain darkness and turn off by a certain
brightness. This type of circuit is installed on
many outside lights and forces them to turn off
and save electricity. They also come on when needed
for safety.
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Old-Style Typewriter
OBJECTIVE: To show how a generator works.
Turn on the slide switch (S1), nothing will happen.
Turn the motor (M1) slowly with your fingers (don’t
use the fan blade), you will hear a clicking that
sounds like an old-time manual typewriter keystrokes.
Spin the motor faster and the clicking speeds up
accordingly.
This circuit works the same if you spin the motor
in either direction (unlike the Motor Speed Detector
project).
By spinning the motor with your fingers, the physical
effort you exert is converted into electricity.
In electric power plants, steam is used to spin
large motors like this, and the electricity produced
is used to run everything in your town.
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Space War Radio
OBJECTIVE: To transmit Space War sounds to a
AM radio.
Place the circuit next to an AM radio. Tune the
radio so no stations are heard and turn on the slide
switch (S1). You should hear the space war sounds
on the radio. The red LED (D1) should also be lit.
Adjust the variable capacitor (CV) for the loudest
signal.
You have just performed the experiment that took
Marconi (who invented the radio) a lifetime to invent.
The technology of radio transmission has expanded
to the point that we take it for granted. There
was a time, however, when news was only spread by
word of mouth.
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The Lie Detector
OBJECTIVE: To show how sweat makes a better conductor.
Turn on the slide switch (S1) and place your finger
across points A & B. The speaker (SP) will output
a tone and the LED (D2) will flash at the same frequency.
Your finger acts as a conductor connecting points
A & B. When a person is lying, one thing the body
starts to do is sweat. The sweat makes the finger
a better conductor by reducing its resistance.
As the resistance drops, the frequency of the tone
increases. Lightly wet your finger and place it
across the two points again. Both the output tone
and LED flashing frequency increase, and the lamp
(L2) may begin to light. If your finger is wet enough,
then the lamp will be bright and the sound stops
- indicating you are a big liar! Now change the
wetness of your finger by drying it and see how
it affects the circuit. This is the same principle
used in lie detectors that are sold commercially.
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Buzzing in the Dark
OBJECTIVE: To make a circuit that buzzes when
the lights are off.
This circuit makes a high-frequency screaming sound
when light shines on the photoresistor (RP), and
makes a buzzing sound when you shield the photoresistor.
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Blow Off a Space War
OBJECTIVE: To turn off a circuit by blowing on
it.
Build the circuit and turn it on, you hear a space
war. Since it is loud and annoying, try to shut
it off by blowing into the microphone (X1). Blowing
hard into the microphone stops the sound, and then
it starts again.
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Water Detector
OBJECTIVE: To show how water conducts electricity.
Build the circuit at left and connect the two jumpers
to it, but leave the loose ends of the jumpers lying
on the table initially. Turn on the slide switch
(S1) - the LED (D1) will be dark because the air
separating the jumpers has very high resistance.
Touch the loose jumper ends to each other and the
LED will be bright, because with a direct connection
there is no resistance separating the jumpers.
Now take the loose ends of the jumpers and place
them in a cup of water, without letting them touch
each other. The LED should be dimly lit, indicating
you have detected water!
For this experiment, your LED brightness may vary
depending upon your local water supply. Pure water
(like distilled water) has very high resistance,
but drinking water has impurities mixed in that
increase electrical conduction.
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Radio Announcer
OBJECTIVE: To hear your voice on the radio.
You need an AM radio for this project. Build the
circuit shown but do not turn on the slide switch
(S1). Place it within a foot of your AM radio and
tune the radio frequency to the middle of the AM
band (around 1000 kHz), where no other station is
transmitting. Turn the volume up so you can hear
the static. Set the adjustable resistor (RV) control
to the middle setting. Turn on the slide switch
and slowly tune the adjustable capacitor (CV) until
the static on the radio becomes quiet. You may hear
a whistle as you approach the proper tuning. In
some cases you may also need to set the adjustable
resistor slightly off- center.
When the radio static is gone, tap on the speaker
(SP) with your finger and you should hear the sound
of tapping on the radio. Now talk loudly into the
speaker (used here as a microphone) and you will
hear your voice on the radio. Set the adjustable
resistor for best sound quality at the radio.
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Symphony of Sounds
OBJECTIVE: To combine sounds from the music,
alarm, and space war integrated circuits.
Build the circuit shown. Turn it on and press the
press switch (S2) several times and wave your hand
over the photoresistor (RP) to hear the full symphony
of sounds that this circuit can create. Have fun!
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Trombone
OBJECTIVE: To build an electronic trombone that
changes pitch of note with slider bar.
When you turn on the slide switch (S1) the trombone
should start playing. To change the pitch of the
note, simply slide the adjustable resistor (RV)
control back and forth. By turning the slide switch
on and off and moving the slider, you will be able
to play a song much like a trombone player makes
music. The switch represents air going through the
trombone, and the adjustable resistor control is
the same as a trombone slider bar. The circuit may
be silent at some positions of the resistor control.
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