Elenco Electronics CI-73 Instruction Manual And User Handbook
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Elenco Electronics CI-73 Instruction Manual And User Handbook

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Copyright © 2014, 2004 by Elenco
Electronics, Inc. All rights reserved. No part of this book shall be reproduced by
REV-E
Revised 2014
753293
®
any means; electronic, photocopying, or otherwise without written permission from the publisher.

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  • Page 1 Copyright © 2014, 2004 by Elenco Electronics, Inc. All rights reserved. No part of this book shall be reproduced by REV-E Revised 2014 753293 ® any means; electronic, photocopying, or otherwise without written permission from the publisher.
  • Page 2 CI-73 - READ THIS FIRST INSTRUCTIONS: The CI-73 is a set of 73 Snap Circuits with special ® software that allows you to “see” the electrical signals 1. Download our software from www.elenco.com/downloads/CI- in the circuits, just like electronics engineers do using 73.zip...
  • Page 3 PC-interface cable to each other and you should see the random pattern on the Winscope screen change as you do so. You are now ready to proceed with the first CI-73 experiment or you may investigate the Winscope software on your own.
  • Page 4 Hold mode button (just to the right of the On-Line button). 1. It is recommended that you disable or turn down the volume to the speakers on your computer. CI-73’s use of Hold mode button the microphone input port will also channel the same signal to the speakers, and the result can be distracting.
  • Page 5 Looking at Electronic Signals using the WINSCOPE Software (continued) IMPORTANT NOTE: The designs for the microphone input port C. The shape of waveforms may appear distorted for some vary throughout the computer industry. Hence you may get circuits, due to protection circuitry that acts as a filter. For waveforms different from those shown in your manual even example: though the circuit is actually performing the same way.
  • Page 6 Limitations of WINSCOPE and Its Interface By using the microphone audio input and the flexible processing Winscope works best on signals up to about 5kHz, since its power of the personal computer, we have created an inexpensive sampling rate is limited to 44kHz. If you attempt to measure and easy-to-use way of looking at electronic signals.

  • Page 7: Table Of Contents

    Project Listings Project # Description Page # Project # Description Page # Pitch PC PC38 Adjustable FM Radio PC Screaming Fan PC PC39 Transistor AM Radio PC (II) Hissing Foghorn PC PC40 Playback & Record PC Light and Sounds PC PC41 Power Amplifier Playing Music PC Light and Sounds PC (II) PC42...
  • Page 8 Project #PC1 Pitch PC OBJECTIVE: To look at the output signal from a transistor oscillator while changing the pitch of the sound. You will now be introduced to the Winscope features, and thereby become familiar with oscilloscopes and spectrum analyzers, and see some of the most important concepts in electronics.
  • Page 9 Click on the On-Line button if Winscope is currently in Hold mode Note that your picture may not exactly match this picture due to and you should get a picture similar to this one: variances in the microphone input gain between computers, which is beyond software control.
  • Page 10 Notice that the waveform seems to be randomly dancing across the Now its time to look at your electronic signal in a different way. The screen, making it hard to study. We can fix this. Click on the oscilloscope features you have been using show you voltage “trigger positive level”...
  • Page 11 The 1:1 gain mode does not apply to the FFT screen, so move the Now you can see that the tone you hear is actually a range of Y1 gain control down to here so you can see the peak energy at related frequencies combined together.
  • Page 12 Now adjust the horizontal scale so the peaks line up with the Now you can click on the FFT box to return to oscilloscope mode gridlines as they did before. and look at the waveform with the 0.1mF capacitor in the circuit. You can observe it with the same settings as before for comparison, but Horizontal scale these settings usually work best:...
  • Page 13 Build the circuit shown. If continuing from the previous experiment Winscope has a mode that can display multiple scans at the same then close the Winscope program and run it again, to reset the time, called Storage mode. Set the adjustable resistor lever to a settings.
  • Page 14 What you see here is the effect of timing variations on the trigger You can also use storage mode when in FFT mode, so turn it on used for synchronization. Turn off the trigger and you will see how now. much variation there is without using the trigger: Storage mode Trigger...
  • Page 15 Project #PC3 Hissing Foghorn PC OBJECTIVE: To demonstrate wait mode with multiple colors. Build the circuit shown. If continuing from the previous experiment then close the Winscope program and run it again, to reset the settings. Click on the On-Line button to activate, and turn on the On-Line Settings switch (snap part S1).
  • Page 16 Place Winscope in Wait mode by clicking on the button for it, then Now your display should look something like this: slowly press the On-Line button several times. Now turn off the Storage mode slide switch (snap part S1) and press On-Line again. Then turn the switch back on.
  • Page 17 Project #PC4 Light & Sounds PC OBJECTIVE: To look at the output signal from a circuit that makes alarm sounds. Build the circuit and connect the Winscope PC-interface cable as shown, the cable should still be connected to the microphone input on your computer.
  • Page 18 If continuing from the previous experiment then close the Winscope Click on the FFT button to look at the frequency spectrum. program and run it again, to reset the settings. Then use the mouse Also set the amplitude and time scales (really amplitude and to set it up as shown here, and turn on the switch (snap part S1).
  • Page 19 Project #PC5 Project #PC6 Light & Sounds PC (II) Light & Sounds PC (III) Modify the circuit for project PC4 by connecting points X and Y on the Modify the circuit by removing the connection between X and Y and snap diagram.
  • Page 20 Project #PC9 Light & Sounds PC (VI) Build the circuit shown. If continuing from the previous experiment then close the Winscope program and run it again, to reset the settings. Click on the On-Line button to activate, and turn on the switch (snap part S1). If you press the key (snap part S2) then you will hear a siren sound, but it will not be very loud.
  • Page 21 If you talk into the microphone now you will get different patterns depending on what words you say, how loudly you say them, and your distance from the microphone. Words produce a more The waveform shown here is from humming into the microphone, “random”...
  • Page 22 You probably noticed that the width of the pulses in the pulse Look back at the Light & Sounds project PC4 on page 16. It shows stream is constantly changing, that is because there is actually a several different ways of configuring the alarm IC to make different second type of modulation occurring here.
  • Page 23 Project #PC12 AM Radio PC OBJECTIVE: To look at the output signal from an AM radio. Build the circuit shown and connect the PC-interface cable to the microphone input on your computer. Turn on the slide switch (snap part S1), tune the variable capacitor (snap part CV) to a local radio station that gives good...
  • Page 24 If continuing from the previous experiment then close the Winscope Click on the FFT button to look at the frequency spectrum. Set the program and run it again, to reset the settings. Then use the mouse time scale (really frequency scale in FFT mode) and amplitude to set the scale to 1:1 mode.
  • Page 25 Project #PC13 Space War PC If continuing from the previous experiment then close the Winscope program and run it again, to reset the settings. Then use the mouse to set it up as shown here, and turn on the switch (snap part S1). Click on the On-Line button to activate.
  • Page 26 Project #PC14 Microphone Click on the FFT button to look at the frequency spectrum for these signals. For best viewing set the amplitude and time scales (really amplitude and frequency scales in FFT mode) to be as shown here. Time scale OBJECTIVE: To see what your voice looks like in electrical FFT button Amplitude scale form.
  • Page 27 If continuing from the previous experiment then close the Winscope Click on the FFT button to look at the frequency spectrum for program and run it again, to reset the settings. Click on the On-Line these signals. Try the amplitude and time scales shown here to button to activate Winscope, and turn on the switch (snap part S1).
  • Page 28 mode) have nearly all of their energy at a specific frequency like for Connect the PC-interface cable directly onto the speaker as shown; the hum. “Square” or “rectangular” looking waveforms (like in no other parts are needed here. If continuing from the previous Project PC1) and most music have a series of mathematically- experiment then close the Winscope program and run it again, to related peaks, while “random”...
  • Page 29 Project #PC16 Symphony of Sounds PC Due to the combination of sounds, the waveform is complex. Set Winscope to the settings shown, or as you prefer. Settings OBJECTIVE: To see the waveforms for a complex signal. Click on the FFT button to look at the frequency spectrum for the signal.
  • Page 30 Project #PC17 Doorbell PC Click on the 5ms/div time scale button and on the FFT button to look at the frequency spectrum for the signal. The Y1 gain control is set for high gain now, so the higher peaks are off the screen but lots of the lower peaks are visible.
  • Page 31 Project #PC18 Periodic Sounds PC Build the circuit shown. If continuing from the previous experiment then close the Winscope program and run it again, to reset the settings. Click on the On-Line button to activate, and turn on the slide switch (snap part S1). Try the settings shown here. Settings OBJECTIVE: To look at the output of an alternately changing circuit.
  • Page 32 Project #PC19 Lasting Doorbell PC Now change to FFT mode to look at the frequency spectrums corresponding to the 2 waveforms above. Try the settings shown here. Settings OBJECTIVE: To look at the output of an alternately changing circuit. This is the spectrum for the oscilloscope waveform shown on the preceding page, which alternates between pulses and flat.
  • Page 33 Build the circuit shown. If continuing from the previous experiment Now change to FFT mode to look at the frequency spectrum as the then close the Winscope program and run it again, to reset the sound fades away. Try the settings shown here. settings.
  • Page 34 Project #PC20 Space War Flicker PC Click on the On-Line button to activate, and turn on the switch (snap part S1). Set Winscope to the settings shown below. The signal from the alarm IC (snap part U2) causes the space war IC (part U3) to step through the 8 different patterns it can create.
  • Page 35 Project #PC21 Buzzing in the Dark PC Build the circuit shown. If continuing from the previous experiment then close the Winscope program and run it again, to reset the settings. Set Winscope to the settings shown below and click on the On-Line button to activate.
  • Page 36 Project #PC22 Trombone PC Turn on FFT mode to look at the frequency spectrum, try the settings shown here. Settings OBJECTIVE: To build a circuit that sounds like a trombone. Now put the 0.02mF capacitor back in place of the 0.1mF capacitor to compare its spectrum.
  • Page 37 Build the circuit shown. If continuing from the previous experiment Note that in the above display then close the Winscope program and run it again, to reset the the Y1 Gain is set high to show settings. Click on the On-Line button to activate, and turn on the the low energy levels of the switch (snap part S1).
  • Page 38 Project #PC23 Sound Pulse 0.5ms/div scale Settings Oscillator PC OBJECTIVE: To build a pulse oscillator. LED (D1) is on layer 1 directly You can also change to the beneath the 0.5ms/div scale to take a closer speaker (SP). look at one of the pulses, shown on the right: Turn on FFT mode to look at the frequency spectrum, try the settings shown here.
  • Page 39 Project #PC24 High Pitch Bell PC Settings OBJECTIVE: To build a high pitch bell. Turn on FFT mode to look at the frequency spectrum, try the settings shown here. Settings Build the circuit shown. If continuing from the previous experiment then close the Winscope program and run it again, to reset the settings.
  • Page 40 Project #PC25 Tone Generator PC Turn on FFT mode to look at the frequency spectrum, try the settings shown here. Settings OBJECTIVE: To build a high frequency oscillator. Project #PC26 Tone Generator PC (II) Build the circuit shown. If continuing from the previous experiment then close the Winscope program and run it again, to reset the Modify the circuit for project PC25 by placing the 0.02mF capacitor settings.
  • Page 41 Project #PC28 Old-Style Typewriter PC Settings OBJECTIVE: To build a circuit that sounds like a typewriter. Turn on FFT mode to look at the frequency spectrum, try the settings shown here. Settings Storage mode Build the circuit shown. If continuing from the previous experiment then close the Winscope program and run it again, to reset the settings.
  • Page 42 Project #PC29 Transistor Fading Siren PC This display (at the same settings) shows the siren when it has almost faded out. The waveform has become weak sometimes erratic. OBJECTIVE: To build a siren that slowly fades away. Turn on FFT mode to look at the frequency spectrum, try the settings shown here.
  • Page 43 Project #PC31 Police Siren Amplifier PC Build the circuit shown and set Winscope to the settings shown below. The siren sound is very loud. In most cases the waveform will have flat edges on the top and bottom, indicating the voltage is too high for the microphone input stage on your computer and is being distorted.
  • Page 44 Project #PC33 Project #PC34 Space War Amplifier PC Adjustable Tone Generator PC Build the circuit shown, and try the settings below. Move the adjustable resistor lever to change the frequency. A sample waveform is shown here. Build the circuit shown and use the same settings as in PC31 to Settings view the waveform.

  • Page 45: Adjustable Fm Radio Pc

    Project #PC38 Adjustable FM Radio PC Try these settings to see the spectrum: OBJECTIVE: To show the output of an FM Radio. Project #PC35 Adjustable Tone Generator PC (II) Modify the circuit for project PC34 by placing the 0.02mF capacitor (C1) on top of the whistle chip (WC).

  • Page 46: Transistor Am Radio Pc (Ii)

    Project #PC39 Project #PC40 Transistor AM Radio PC (II) Playback & Record PC OBJECTIVE: To show the output of an AM Radio. OBJECTIVE: To show the waveforms for music and your voice. Turn on the switch and adjust the variable capacitor (CV) for a Build the circuit shown.

  • Page 47: Power Amplifier Playing Music Pc

    Project #PC41 Power Amplifier Use Winscope to view the waveform and frequency spectrum when playing back your recording and music. A sample music waveform is shown here. Playing Music IC Sample music waveform OBJECTIVE: To show how high amplification can distort Build the circuit shown.

  • Page 48: Music Meter Pc

    This recorder IC circuit works the same as in project PC40 except Use the LOW (or 10mA) setting on the meter (M2). Set the that the power amplifer IC (U4) used here makes the sound much adjustable resistor (RV) to the bottom position and turn on the slide louder than in project PC40.

  • Page 49: Oscillation Sounds Pc

    Project #PC43 Oscillation Sounds PC You may look at a pulse close-up by changing the time scale and slightly adjusting the delay, as shown. Time scale Delay OBJECTIVE: To view the output of an oscillator circuit. You may look at the frequency spectrum on your own if desired. Project #PC44 Oscillation Sounds PC (II)

  • Page 50: Oscillator Sounds Pc

    Project #PC47 Project #PC48 Oscillation Oscillator Sounds PC Sounds PC (II) Using the circuit from PC47, install the whistle chip on top of capacitor C1. Notice how the spacing OBJECTIVE: To view the output of an oscillator circuit. between the pulses has changed. Project #PC49 Whistle Chip Sounds PC OBJECTIVE: To view the output of an oscillator circuit.

  • Page 51: Whistle Chip Sounds Pc (Ii)

    Project #PC53 Bird Sounds PC Build the circuit and try the settings shown. You may try other settings to zoom in or look at the frequency spectrum. Settings OBJECTIVE: To view the output of an oscillator circuit. Project #PC50 Whistle Chip Sounds PC (II) Connect the whistle chip (with the Build the circuit and try the settings shown.

  • Page 52: Bird Sounds Pc (Ii)

    Project #PC54 Bird Sounds PC (II) Build the circuit and try the settings shown. Start with the adjustable resistor set to the left but then adjust to change the tone. The signal dies out after you release the switch. Replace the 100mF capacitor (C4) with the 10mF capacitor (C3). The frequency of the oscillator is the same as before (and so the pulses look Settings the same), but the oscillator activates in shorter intervals (so the bursts of...

  • Page 53: Variable Oscillator Pc

    Project #PC59 Variable Oscillator PC Build the circuit and try the settings shown. Move the adjustable resistor lever to change the pitch of the sound and pulse separation in the waveform. Settings OBJECTIVE: To view the output of an oscillator circuit. Project #PC60 Variable Oscillator PC (II)

  • Page 54: Electronic Sound Pc

    Project #PC63 Electronic Sound PC Build the circuit and try the settings shown. Press the press switch to lower the frequency of the signal by increasing the capacitance in the oscillator. You can replace the 0.1mF capacitor C2 with the 10mF capacitor C3 (“+”...

  • Page 55: Siren Pc

    Project #PC65 Siren PC Note: Although the amplitude of the pulses appears to be varying across the screen (the wider time scale shown below shows this better), this is an illusion caused by the way Winscope measures the signal. The amplitude of the pulses is not really varying. OBJECTIVE: To view the output of a fading siren circuit.

  • Page 56: Drawing Resistors Pc

    Project #PC66 Project #PC67 Drawing Resistors PC Electronic Noisemaker PC OBJECTIVE: To draw your own resistors. OBJECTIVE: To view the output of an oscillator circuit. Use the circuit from the Drawing Resistors project #516, but connect the PC-interface cable across the speaker. Use a pencil to draw the shapes shown in projects #516-518, as per the directions given in those projects.

  • Page 57: Electronic Noisemaker Pc (Ii)

    Project #PC69 Bee PC Sample frequency spectrum: Settings OBJECTIVE: To view the output of an oscillator circuit. Sample waveform: Settings You can replace the 0.1mF capacitor C2 with the 10mF capacitor C3 (“+” on the right) to change the sound. Project #PC68 Electronic Noisemaker PC (II) Replace the 10KW resistor R4 with the 100KW resistor R5.

  • Page 58: Bee Pc (Ii)

    Project #PC71 Space War Alarm Combo PC Build the circuit and press the press switch a few times, you hear cute sounds like a bumble bee. Use Winscope to see how the waveform fades away after you release the switch, and try storage mode as shown here.

  • Page 59: Space War Music Combo Pc

    Project #PC72 Project #PC73 Space War Music Combo PC Sound Mixer PC OBJECTIVE: To view the output of the combined outputs from OBJECTIVE: To view the output of the music and alarm the space war and music integrated circuits. integrated circuits. Build the circuit and try the settings shown.
  • Page 60 IMPORTANT NOTICE Disclaimer Information Oscilloscope for Windows95 or newer, version 2.51. ® OSCILLOSCOPE IS SUPPLIED TO YOU AS IS, AND IN NO CASE IS THE AUTHOR OF THIS PROGRAM RESPONSIBLE FOR PERSONAL INJURY, HARDWARE AND/OR DATA DAMAGE, PROPERTY DAMAGE OR PROFIT LOSS ARISING FROM USE OR INABILITY TO USE THIS SOFTWARE.

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