Elenco Electronics Snap Circuits Instruction Manual
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Elenco Electronics Snap Circuits Instruction Manual

Experiments 306-511
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Copyright © 2003 by Elenco
Electronics, Inc. All rights reserved. No part of this book shall be reproduced by
753104
any means; electronic, photocopying, or otherwise without written permission from the publisher.

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  • Page 1 Copyright © 2003 by Elenco Electronics, Inc. All rights reserved. No part of this book shall be reproduced by 753104 any means; electronic, photocopying, or otherwise without written permission from the publisher.

  • Page 2: Hand-Control Display 1

    Table of Contents Basic Troubleshooting MORE DO’s and DON’Ts of Building Circuits Parts List Project Listings 6, 7 MORE About Your Snap Circuits Parts Experiments 306-511 9 - 57 MORE Advanced Troubleshooting More Snap Circuits Projects WARNING: Always check your wiring before turning on a circuit.
  • Page 3 Parts List (Colors and styles may vary) Symbols and Numbers Note: There are additional part lists in your other project manuals. Part designs are subject to change without notice. Important: If any parts are missing or damaged, DO NOT RETURN TO RETAILER. Call toll-free (800) 533-2441 or e-mail us at: help@elenco.com.
  • Page 4 MORE About Your New Snap Circuits Parts (Note: There is additional information in your other project manuals). (Part designs are subject to change without notice). relay (S3) is an electronic switch with contacts that can be closed or opened. It contains a coil that generates a magnetic field FM module (FM) contains an integrated FM radio circuit.
  • Page 5 MORE About Your Snap MORE Advanced Troubleshooting (Adult supervision Circuits Parts (continued) Elenco Electronics is not responsible for parts damaged due to incorrect wiring. SCR (Q3) - An SCR is a three pin (anode, cathode If you suspect you have damaged parts, you can follow this procedure to systematically and gate) controlled silicon diode.

  • Page 6: More Do's And Don'ts Of Building Circuits

    For example, the order of parts connected in WARNING: SHOCK HAZARD - Never connect snap circuits to the series or in parallel does not matter — what matters is how combinations of these electrical outlets in your home in any way!

  • Page 7: Table Of Contents

    Project Listings Project # Description Page # Project # Description Page # Project # Description Page # AM Radio Music Meter Display Letter “e” Adjustable Volume FM Radio LED & Relay Display Letter “h” Playback & Record Manual 7 Second Timer Display Letter “o”...
  • Page 8 Project Listings Project # Description Page # Project # Description Page # Project # Description Page # Oscillator Sound (V) Flashing “U & L” Variable Oscillator (II) Transistor Tester Flashing “b & c” Variable Oscillator (III) Variable Oscillator (IV) Adjustable Voltage Divider Flashing “d &...

  • Page 9: Am Radio

    Project #306 AM Radio OBJECTIVE: To build a one IC AM radio. Turn on the slide switch (S1) and adjust the variable capacitor (CV) for a radio station. Project #307 Adjustable Volume FM Radio OBJECTIVE: To build a working FM radio with adjustable volume.

  • Page 10: Playback & Record

    Project #308 Playback & Record OBJECTIVE: To demonstrate the capabilities of the recording integrated circuit. Build the circuit shown. Turn on the switch (S1), you hear a beep signaling that you may begin recording. Talk into the microphone (X1) up to 8 seconds, and then turn off the switch (S1) (it also beeps after the 8 seconds expires).

  • Page 11: Power Amplified Playing Music

    Project #312 Power Amplified Playing Music OBJECTIVE: To build a circuit that amplifies the recording IC. Connecting the power amp IC (U4) to the output of the recording IC (U6), you can make much louder music than project 308. Turn on the switch (S1), you hear a beep signaling that you may begin recording.

  • Page 12: Fm Radio

    Project #316 FM Radio OBJECTIVE: To build a working FM radio. The FM module (FM) contains a scan (T) and a reset (R) button. The R button resets the frequency to 88MHz. This is the beginning of the FM range. Press the T button, the module scans for the next available radio station.

  • Page 13: Scr 2.5V Bulb

    Project #318 SCR 2.5V Bulb OBJECTIVE: To learn the principle of an SCR. This circuit demonstrates the principle of the SCR (Q3). The SCR can be thought of as an electronic switch with three leads: anode, cathode, and gate. Like a standard diode, it permits current flow in only one direction.

  • Page 14: Music Alarm

    Project #320 Music Alarm OBJECTIVE: To build a music alarm. The alarm circuit activates when you remove the jumper wire from points A & B. The jumper wire shorts the SCR’s (Q3) gate to ground and the SCR does not conduct. Removing the jumper wire places a voltage on the gate and the SCR conducts.

  • Page 15: 1Ma Meter

    Project #323 1mA Meter OBJECTIVE: To build a 1mA meter circuit. Inside the meter (M2), there is a fixed magnet and a moveable coil around it. As current flows through the coil, it creates a magnetic field. The interaction of the two magnetic fields cause the coil (connected to the pointer) to move (deflect).

  • Page 16: Function Of Variable Resistor

    Project #325 Function of Variable Resistor OBJECTIVE: To understand the function of the variable resistor. A variable resistor is a normal resistor with an additional arm contact. The arm moves along the resistive material and taps off the desired resistance. The knob on the variable resistor moves the arm contact and sets the resistance between the left and center pins.

  • Page 17: Meter Deflect By Motor

    Project #327 Meter Deflect by Motor OBJECTIVE: To change the direction of current flow using a motor. A motor generates a current when it rotates. The rotation of the motor determines the direction current flows. Quickly spin the motor (M1) clockwise with your hand;...

  • Page 18: Principle Of Segment Led

    Project #329 Principle of Segment LED OBJECTIVE: To demonstrate how a seven segment LED works. The display (D7) is made up of seven segments. Each segment contains an LED connected to an input snap. When the snap is connected to the negative of the battery the segment lights. For example, connect the circuit as shown and the letter “L”...

  • Page 19: Display #5

    Project #334 Project #335 Project #336 Display #5 Display #6 Display #7 OBJECTIVE: To configure the seven OBJECTIVE: To configure the seven OBJECTIVE: To configure the seven segment to display the number 5. segment to display the number 6. segment to display the number 7. Connect A, F, G, C, &...

  • Page 20: Led & Relay

    Project #341 LED & Relay OBJECTIVE: Turn on and off LEDs using a relay. A relay is an electronic switch with contacts that are opened or closed using voltage. It contains a coil that generates a magnetic field when a current flows through it. The magnetic field attracts an iron armature which switches the contacts.

  • Page 21: Half Wave Rectifier Circuit

    Project #343 Half Wave Rectifier Circuit OBJECTIVE: To build a half wave rectifier circuit. A rectifier changes an AC voltage into a DC voltage. A diode (D1) is used because it allows current to flow in only one direction, for one polarity of applied voltage.

  • Page 22: Telegraph

    Project #347 Telegraph OBJECTIVE: Making telegraph sounds. Press the switch (S2) down. The circuit oscillates and the AC voltage generated from the transformer (T1) drives the speaker (SP). To make a telegraph sound, depress the switch for long and short Project #348 Mosquito Sound OBJECTIVE: Use the whistle chip to make a mosquito sound.

  • Page 23: Bulb & Relay

    Project #352 Bulb & Relay OBJECTIVE: Light a bulb using a relay. Turn off the slide switch (S1). If you press switch (S2), the bulb (L2) will not light. Turn on switch (S1) and press switch (S2) again; the bulb lights.

  • Page 24: Transistor Timer

    Project #354 Transistor Timer OBJECTIVE: To build a manual timer using a transistor in place of the relay. This circuit is similar to project 342 except now two transistors are used. Turn on the switch (S1) and hold down the press switch (S2). The transistors (Q1 &...

  • Page 25: Adjustable Light Control

    Project #357 Adjustable Light Control OBJECTIVE: Build an adjustable light-controlled relay. You can set the amount of light it takes to keep the bulb (L2) on by adjusting the variable resistor (RV). Set the variable resistor to the top position and turn on the switch. The bulb lights. Cover the photo resistor (RP) and the bulb turns off.

  • Page 26: Ac To Dc Current

    Project #359 AC to DC Current OBJECTIVE: To convert an AC current to DC using an LED. Pressing and releasing the press switch (S2) continuously generates an AC current. The LED (D1) is used to convert the AC current to DC current because it only allows the current to flow in one direction.

  • Page 27: Buzzer, Relay, & Transformer

    Project #361 Buzzer, Relay, & Transformer OBJECTIVE: To use a transformer for a louder buzzer. Turn on the switch (S1). The speaker (SP) generates a buzzer sound. As in project 353, the relay (S3) is rapidly switched on and off. This causes an AC voltage on the secondary of the transformer (T1).

  • Page 28: Display Capital Letter "F

    Project #363 Project #364 Display Capital Display Capital Letter “F” Letter “H” OBJECTIVE: To configure the seven OBJECTIVE: To configure the seven segment to display the capital letter “F”. segment to display the capital letter “H”. Connect A, E, F, & G to the negative of Connect B, C, E, F, &...

  • Page 29: Display Letter "B

    Project #371 Display Letter “b” OBJECTIVE: To configure the seven segment to display the letter “b”. Connect C, D, E, F, & G to the negative of the battery. Project #372 Display Letter “c” OBJECTIVE: To configure the seven segment to display the letter “c”. Connect A, F, &...

  • Page 30: Alarm By Scr

    Project #377 Alarm by SCR OBJECTIVE: To build an alarm circuit. The circuit uses the space war IC (U3) and works the same way as project 320. Remove the jumper wire and a space war sound plays. Project #378 Light Space War Alarm OBJECTIVE: To build an alarm circuit.

  • Page 31: Delay Light

    Project #381 Delay Light OBJECTIVE: To construct a time delay circuit. Turn on the slide switch (S1) and the bulb (L2) does not light. Press switch (S2) and slowly the bulb lights. When the switch (S2) is pressed, current flows to the base of the transistor (Q2) and charges the 100µF capacitor (C4).

  • Page 32: Recording Led Indicator

    Project #384 Recording LED Indicator OBJECTIVE: To build a circuit that lights an LED to indicate the recording mode. The circuit uses sound (beep) and light (LED) to indicate that you are recording. Build the circuit; the red (D1) and green (D2) LEDs should light.

  • Page 33: Alarm Light

    Project #386 Alarm Light OBJECTIVE: To light a bulb to indicate an open circuit. This is another example of a alarm that activates when the circuit is broken. Connect the jumper wire across points A & B and then turn on the switch (S1).

  • Page 34: Night Police Car

    Project #388 Night Police Car OBJECTIVE: To build a night-sensitive police car sound. As the photo resistor (RP) is exposed to light, its resistance is very low, thereby connecting the gate of the SCR (Q3) to ground. This prevents the SCR from conducting, connecting the alarm IC (U2) to the batteries.

  • Page 35: Daytime Light Police Car

    Project #392 Daytime Light Police Car OBJECTIVE: To build a light-sensitive police car sound. As long as the photo resistor (RP) is exposed to light, the alarm IC (U2) outputs a signal to the speaker (SP). Block the light with your hand and the sound will stop.

  • Page 36: Flashing 8

    Project #396 Flashing 8 OBJECTIVE: Use the Alarm IC as a switch to flash the number “8”. Turn on the switch (S1) and the number 8 starts flashing. segments are powered by connecting them to the IC’s (U2) output. Project #397 Flashing 8 with Sound OBJECTIVE: To build a circuit so you can hear and see the 8 flash.

  • Page 37: Oscillation Sounds

    Project #399 Oscillation Sounds OBJECTIVE: To make sounds with an oscillator circuit. Turn on the switch (S1) and the speaker (SP) emits an oscillating sound. Now connect the whistle chip (WC) across points A & B and the sound changes. Project #400 Oscillation Sounds (II) OBJECTIVE: Show variations of project 399.

  • Page 38: Oscillator Sound

    Project #404 Oscillator Sound OBJECTIVE: Build an oscillator circuit. Turn on the switch (S1) and the LED (D1) lights as the speaker (SP) emits a tone. The circuit oscillates and generates an AC voltage across the speaker through the transformer (T1). Project #405 Oscillator Sound (II) OBJECTIVE: Show variations of project 404.

  • Page 39: Transistor Tester

    Project #409 Transistor Tester OBJECTIVE: To build a circuit that checks the transistor. Turn on the switch (S1), the meter (M2) does not move. Press the switch (S2), the meter deflects and points to 10. This indicates the transistor (Q2) is GOOD. The meter would only deflect a little or not at all for a BAD transistor.

  • Page 40: Automatic Display Capital Letter "C

    Project #411 Automatic Display Capital Letter “C” OBJECTIVE: To construct a light controlled display for capital letters. Connect segments A, D, E & F to the circuit. Turn on the switch (S1), the display should be off. Place your hand over the photo resistor (RP), now the capital letter C lights.

  • Page 41: Whistle Chip Sounds

    Project #419 Whistle Chip Sounds OBJECTIVE: To make sounds from the whistle chip. Turn on the switch (S1). As the circuit oscillates, the plate in the whistle chip vibrates and generates sound. Project #420 Whistle Chip Sounds (II) OBJECTIVE: Show variations of project 419. Connect the whistle chip (WC) across points B &...

  • Page 42: Led Music

    Project #425 LED Music OBJECTIVE: To light the LEDs using the recording IC. The recording IC (U6) lights the LEDs (D1 & D2) instead of driving the speaker (SP). Press the switch (S2) once. The LEDs light and then turn off after a while. Press the switch (S2) again and see how long the second song plays.

  • Page 43: Alarm Recorder

    Project #428 Alarm Recorder OBJECTIVE: To record the sound from the alarm IC. The circuit records the sound from the alarm IC (U2) into the recording IC (U6). Turn on the switch (S1). The first beep indicates that the IC has begun recording.

  • Page 44: Time Delay 1-7 Seconds

    Project #431 Time Delay 1-7 Seconds OBJECTIVE: To build a time delay circuit. The length of time the motor (M1) runs depends on the position of the variable resistor (RV). When the press switch (S2) is pressed, the 470µF capacitor (C5) charges. As the press switch is released, C5 discharges through the resistors R4 and RV, turning the transistor (Q2) on.

  • Page 45: Manual 7 Second Timer (Ii)

    Project #433 Manual 7 Second Timer (II) OBJECTIVE: To build a manual timer using a relay and whistle chip. This circuit is similar to project 431 except now the whistle chip (WC) will also make sound. Project #434 15 Second Alarm OBJECTIVE: To build a circuit that sounds the speaker for 15 seconds.

  • Page 46: Flashing "1 & 2

    Project #435 Flashing “1 & 2” OBJECTIVE: Use the Alarm IC as a switch to flash the numbers “1 & 2”. Connect segments B & C to the circuit. Turn on the switch (S1) and the number “1” should be flashing. Now, connect A, B, G, E, & D to flash the number “2”.

  • Page 47: Flashing "C & E

    Project #440 Flashing “C & E” OBJECTIVE: Use the Alarm IC as a switch to flash the letters “C & E”. Use the circuit in project 435. Connect A, D, E, & F to the circuit. Turn on the switch (S1) and the capital letter “C” should be flashing. Now, connect A, D, E, F, &...

  • Page 48: Bird Sounds

    Project #447 Bird Sounds OBJECTIVE: To create bird sounds. Turn on the switch (S1). The circuit makes a bird sound. Project #448 Bird Sounds (II) OBJECTIVE: To create bird sounds. Use the circuit in project 447. Replace the 100µF (C4) capacitor with the 10µF capacitor (C3), the tone should be much higher.
  • Page 49 Project #453 Motor Sound Recording OBJECTIVE: Build a circuit that records the sound of the motor spinning. Placing the motor (M1) (with the fan attached) next to the microphone (X1) enables you to record the sound as it spins. Turn off and then turn on the switch (S1).
  • Page 50 Project #455 Relay & Buzzer OBJECTIVE: Use the whistle chip and relay to make sound. Turn on the switch (S1) and the relay (S3) opens and closes continuously. This creates an AC voltage across the whistle chip (WC), causing it to vibrate and sound. Project #456 Project #457 Relay and Speaker...
  • Page 51 Project #458 Electronic Cat OBJECTIVE: To create the sound of a cat. Set the variable resistor (RV) to the far left. Press and release the switch (S2). You should hear the sound of a cat from the speaker (SP). Now adjust the resistor and hear the different sounds.
  • Page 52 Project #466 Meter Deflection (II) OBJECTIVE: To build change the direction in which current flows. Compare this circuit to project 358, which has the LED positions reversed. This changes the direction that current can flow. Press the press switch (S2) and now the meter (M2) deflects to the left. Project #467 Automatic Display #1 OBJECTIVE: Construct a light-controlled display.
  • Page 53 Project #469 Project #470 Project #471 Automatic Automatic Automatic Display #3 Display #4 Display #5 OBJECTIVE: Light the number 3 using a OBJECTIVE: Light the number 4 using a OBJECTIVE: Light the number 5 using a light-controlled display. light-controlled display. light-controlled display.

  • Page 54: Variable Oscillator (Iii)

    Project #477 Variable Oscillator OBJECTIVE: To change the tone using the variable resistor. Set the variable resistor (RV) to the bottom position. Turn on the switch (S1) and you should hear sound from the speaker (SP). Adjust the resistor to hear the different sounds. Project #478 Variable Oscillator (II) OBJECTIVE: To change the tone using the variable resistor.

  • Page 55: Fixed-Voltage Divider

    Project #485 Fixed-Voltage Divider OBJECTIVE: To make a fixed current path. The meter (M2) indicates the amount of current in the circuit. Turn on the switch (S1), the needle deflects indicating the amount of current. The 10kΩ resistor limits the current, otherwise the meter could be damaged. Project #486 Simple Illumination Meter...

  • Page 56: Led Voltage Drop

    Project #487 LED Voltage Drop OBJECTIVE: To measure the voltage drop across diodes. Turn on the switch (S1) and the LED (D1) lights as the meter (M2) deflects to the middle of the scale. The sum of the voltage drop across each components equals the battery voltage.

  • Page 57: Hand-Control Meter

    Project #489 Hand-Control Meter OBJECTIVE: To understand music deflection. Instead of driving a speaker (SP) with the music IC (U1), you can see it by using the meter (M2). Turn on the switch (S1) and the meter deflects according to the rhythm of music. When music stops, press switch (S2) once to start the music again.

  • Page 58: Fixed-Voltage Divider

    Project #493 Fixed-Voltage Divider OBJECTIVE: To make a simple voltage divider. This circuit is a simple voltage divider with parallel load resistors. The voltages across both resistors are the same. The current through both paths are different, due to the resistor values. Since resistor (R3) (5.1kΩ) is half the value of resistor (R4) (10kΩ), twice the current flows through R3.

  • Page 59: Automatic Display Letter "B

    Project #495 Automatic Display Letter “b” OBJECTIVE: To construct a light-controlled display for lower case letters. Connect C, D, E, F & G to the circuit. Turn on the switch (S1) and the display should be off. Place your hand over the photo resistor (RP), now the letter “b”...
  • Page 60 Project #501 Hand-Control Display 1 & 4 OBJECTIVE: Display numbers 1 or 4 using the slide switch. Using the diagram shown, connect 2-snap wires to segments B, C, F, & G. Turn the switch (S1) off and on, the display changes from numbers 1 to 4.

  • Page 61: Monitor A Capacitor Charging & Discharging

    Project #506 Monitor a Capacitor Charging & Discharging OBJECTIVE: View charging and discharging a capacitor. Using the meter (M2), we can monitor the charging and discharging of a capacitor. First turn off the switch (S1). Charging: Connect the meter (M2) to points A & B (positive pole downward).

  • Page 62: Rhythm Swinging Meter

    Project #508 Rhythm Swinging Meter OBJECTIVE: Use the meter with the alarm IC. Connect 3-snap wires to terminals E & F, and C & D. Turn on the switch (S1) and the meter (M2) swings rhythmically. You should hear a machine gun sound generated by the alarm IC (U2). Project #509 Project #510 Project #511...
  • Page 63 Requires 2 “AA” batteries. you will have a working camera “you built” when you are finished. Solar Deluxe Educational Kit Computer Interface for Snap Circuits Model SK-40 Model CI-21 By solar power, harness the power of the sun with With this module you will also learn about this environment-friendly D.I.Y.

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