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The Learning Circuit 92: DIY AC Waveform Function Generator Kit

element14 presents
DIY AC Waveform Function Generator Kit

The Learning Circuit | element14 presents |  Project Videos

 

 

After just learning about alternating current, Karen solders and assembles a function generator kit in order to generate various waveforms. Once complete, Karen connects the function generator to her oscilloscope to see the various square, sine, and triangle waves. Check out the video to see what happens when Karen also connects a speaker and a string of LEDs!

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  • in reply to makerkaren

    Another resource which may be of interest.

    Oscilloscopes 101 for Engineering Students
    https://www.youtube.com/playlist?list=PL2XuMA5AwNUznkBE46tcZAF3p5Edxgm-z

  • Nice, thank you Karen.

     

    I've mounted my own and used it to measure the inductance of a home made inductor using the impedance formula, the RMS voltage and the frequency.

  • in reply to DAB

    Creating a DIY mirror galvanometer could be another fun project, like this one:

     

  • in reply to makerkaren

    Hi Karen,

     

    You can take an inexpensive mirror and just glue a tooth pick to the speaker and attach the other end to the mirror. Just support the other end of the mirror so that the speaker can move the other end.

    You hook up your signal generator to the speakers.

    Take a laser pointer and set it up with the beam hitting the mirror so that the reflection shows on a flat surface.

     

    As you generate signals, you should see the laser reflection move in response.

     

    It should be pretty easy to set up.

     

    DAB

  • in reply to makerkaren

    It's double the fun with two as you can deflect the laser in both X and Y axis

    Arduino Laser Show With Full XY Control : 33 Steps (with Pictures) - Instructables

  • in reply to makerkaren

    You may want to take a look at Keysight's Educator's Training Kit Lab Guide.
    (Lab 6 introduces the function generator.)

     

    Educator’s Training Kit Lab Guide for 1000 X-Series Oscilloscopes

     

    https://www.keysight.com/gb/en/assets/9018-04489/training-materials/9018-04489.pdf

    "This EE/Physics Student’s Oscilloscope Lab Guide and Tutorial is intended to be used with Keysight Technologies InfiniiVision 1000 X-Series oscilloscopes."

     

    The scope models with the 'G' suffix have the function generator built in.

    The lower cost non-generator equipped models also have some waveforms built into them, but no output connector, which is still useful for training purposes.

  • in reply to beacon_dave

    Not really. I haven't played around with my Scope enough. I only have a pdf copy of the manual and I struggle to read that much digitally. Wish I had a printout. I didn't even realize my scope had a built in function generator.

  • in reply to DAB

    Oh that's really interesting. You'd hook the waveform generator up to the speaker? I don't think I understand how laser scanners work well enough to know how that would all work together.

  • Well done Karen! Nice to see the https://en.wikipedia.org/wiki/Intersil_ICL8038 still making sine waves today!

  • Have you used the built in function generator feature of your scope yet ? How does it compare with the one you have assembled in this episode ?