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3 digit digital homemade frequency counter

Discussion in 'Buy, Sell and Trade' started by k7elp60, Jan 29, 2012.

  1. k7elp60

    k7elp60 Active Member

    Joined:
    Oct 21, 2003
    Messages:
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    Location:
    Utah
    I will sell it for $10.00 plus $5.00 shipping in the USA. I am located in Ivins UT, USA
    This counter was designed and built by me about 10 years ago. It will count from 100HZ to 99.9Khz. It uses a colorburst crystal for the clock and a MM5369EST IC to divide and generate a 100Hz to the circuitry. It also has a CD4013, CD4093, MC14553 counter IC and a MC14543 desplay driver. It has a LMC555CN as a internal frequency of 7.3Khz. This frequency is shown on the front panel. It is fully operational. There are two protoboards stacked with the IC's on them. The 3 digit 7 segement display is wirewrapped and connected to the top board. The bottom board has a 16pin empty socket between the MM5369 and the CD4013 if one wants to change the sample frequency. The left RCA jack is the 7.3Khz out and the right RCA jack is the conter input. The project required a test frequency for testing purposes. The circuit draws about 50mA from a 9V battery. A schematic is available. The Cabinet measures 6 1/4" W 5" D and 3" H.
    I will include a schematic and extra LED displays and parts I have to make it a 6 digit counter.
    Send me a PM and I will send you imiages of the counter
     
    Last edited: Jan 29, 2012
  2. steve-y

    steve-y New Member

    Joined:
    Feb 17, 2012
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    Location:
    Cold Lake, AB, CA
    Hello,
    I am living in Cold Lake, AB, Canada. If you can send the counter together with other components mentioned, how much I will owe you? Before you send of course.
    Thanks.
     
  3. k7elp60

    k7elp60 Active Member

    Joined:
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    Location:
    Utah
    steve-y,
    I didnot know that lyou posted a reply to my frequency counter ad. Are you still interested?
    Please email to K7ELP@ARRL.NET
    nED
     
    Last edited: Mar 9, 2012
  4. dave

    Dave New Member

    Joined:
    Jan 12, 1997
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  5. k7elp60

    k7elp60 Active Member

    Joined:
    Oct 21, 2003
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    Likes:
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    Location:
    Utah

    This frequency counter has found a new home.!!!!
     

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