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NEW (11/20/2021) - Grandson of Zerobeat Right Angle

Need other parts to complete your kit ? Please see the: switch and parts page

[Grandson of Zerobeat circuit board picture - click for larger version] The Grandson of Zerobeat Right Angle is an update of the Grandson of Zerobeat kit which has a right angle daughter board for the LEDs in either 3mm or 5mm LEDs or the HP LED array

Grandson of Zerobeat Right Angle has 9 LEDs which graphically indicate the frequency of a received CW audio tone. Adjust your transceiver's frequency until the green LED lights up and you are within +/- 10 Hz of zero beat with the transmitting station.

  • uses an HP multi-color (red-red-yellow-yellow-green-green-yellow-yellow-red-red) LED array OR 3mm OR 5mm LEDs
  • one pot audio detector setting
  • board size: depends on which option
  • reverse the "direction" of the LED frequency indication with a switch press and release
  • set the offset frequency from 400 to 1200 Hz with a switch press and hold
  • default offset frequency is 600 Hz
  • OR just request by email before ordering to have your kit preset to your favorite CW center frequency
  • all board mounted parts including machine pin sockets come with kit
  • just add your metal enclosure, +12V power jack, audio jack and switch to complete the kit
  • printed documents are NOT included, please print/view your own from the pdf files provided
  • Kit price (No manual) is $23 for 3mm LEDs, $25 for 5mm LEDs, $28 for HP LED array + shipping/handling

    • Scroll down for the manual, schematic and other acrobat files for this kit

    Print out a Kit order form to figure your order manually
    or try our: javascript order form to let your browser do the math!

    Inquire via email for pricing of the Grandson of Zerobeat Right Angle PIC chip alone or any other kit questions:



    5mm LED demo video on Youtube - a short Youtube video by K9LW (thank you) of the Grandson of Zerobeat 5mm LED kit

    Downloadable files for Grandson of Zerobeat Right Angle

    The Acrobat files of complex diagrams (like the schematic) may not view well on your computer screen - suggestion: use the magnifier to zoom in for better detail or print out the file.

    gzbramanhp1.pdf - an Acrobat file of the HP LED Array Grandson of Zerobeat RA manual

    gzbrahpdiag.pdf - an Acrobat file of the HP LED Array Grandson of Zerobeat RA parts placement

    hpgzbsch.pdf - an Acrobat file of the HP LED Array Grandson of Zerobeat RA schematic

    gzbraman3mm1.pdf - an Acrobat file of the 3mm LED Grandson of Zerobeat RA manual

    gzbra3mmdiag.pdf - an Acrobat file of the 3mm LED Grandson of Zerobeat RA parts placement

    3mmragzbsch.pdf - an Acrobat file of the 3mm Grandson of Zerobeat RA schematic

    gzbraman5mm1.pdf - an Acrobat file of the 5mm Grandson of Zerobeat RA manual

    gzbra5mmdiag.pdf - an Acrobat file of the 5mm Grandson of Zerobeat RA parts placement

    5mmragzbsch.pdf - an Acrobat file of the 5mm Grandson of Zerobeat RA schematic
    Note: Firefox can't "see" the schematic for some reason, try a right click & save link as to download the schematic and view it with Acrobat
    if that doesn't work, please email me and I can attach a copy of the schematic to the reply

    gzb ra hu.pdf - an Acrobat file of the Grandson of Zerobeat hookup picture

    gzbramodop.pdf - an Acrobat file of the Grandson of Zerobeat RA optional modification ideas

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