AD9850 HC_SR08 DDS module pinout?

Discussion in 'Homebrew and Kit Projects' started by AA7EJ, Jul 21, 2013.

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  1. AA7EJ

    AA7EJ Ham Member QRZ Page

  2. KE3WD

    KE3WD Ham Member QRZ Page

  3. VK5TM

    VK5TM Ham Member QRZ Page


    Ignore the type of crystal, but they all follow this pinout."ZOUT1" would be Sine1 and "QOUT1” the square wave output (I can't see the markings in your link) I think.

    Sinewave output 2 in the pic above is the filtered output. The two VCC pins are interconnected, you only need to use one of them.

    Also beware, yours is possibly a 3.3V unit. You will need to check the xtal part number to be sure.

    Terry VK5TM
    Last edited: Jul 21, 2013
  4. AA7EJ

    AA7EJ Ham Member QRZ Page

    Many thanks Terry.
    There are no visible data on crystal to tell me if it is good for 3.3 or 5 volts.
    Funny, the spec said " will work on 3.3 or 5 " I guess I'll put couple of diodes in series with the 5V volt to make sure or Google for crystal spec. Or just find 3.3V regulator HI HI HI.
    I suppose the LED could function as cheap supply indicator, but that would be after the fact if it is designed for 3.3V anyway. Bad idea!

    So next question to the gurus – anybody got a simple amplifier to hook up to the output of the module, for buffering etc. I am just too lazy to Google for it HI HI HI.

    73 Vaclav
    Last edited: Jul 21, 2013
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