[Fwd: LF: DDS Board - Anyone interested ?]

Andre' Kesteloot akestelo@bellatlantic.net
Thu, 25 May 2000 07:18:14 -0400

Talbot Andrew wrote:

> I am considering bulk manufacture of a Printed Circuit Board for the
> AD9850 DDS chip.  The design has already been tested and includes the
> DDS, output filter, voltage regulator and a 16F84 PIC.  Resident
> software allows the DDS source to be controlled over an RS232 link from
> a PC with ASCII commands.  This allows for control from a simple
> terminal programme as well as custom software for PSK/ FSK etc.   There
> is no reason why different PIC software can't be used for keyboard /
> rotary encoder etc.   Mostly surface mount (large 1206 components
> though)  but conventional PIC in a socket for easy firmware changes.
> If there is enough interest I will go ahead with a PCB order.  It is
> possible a company (see   WWW.HF-INST.CO.UK  ) may take the design on
> board and market as a complete signal source, but for now I will just
> get PCBs made if enough interest is shown.  Not sure of the price, it
> depends on such things as quantity, how many plated through holes,
> delivery timescales and probably the phase of the Moon !
> The DDS can be clocked with any frequency source desired.   For LF I use
> a 5MHz input derived from a master reference which allows outputs up to
> 1.7 MHz with 0.001 Hz resolution, but any clock up to 120MHz (40 MHz
> maximum output) is useable.
> Anyone interested, please let me know so I can get an idea of whether it
> is worth going ahead with a commercial run.
> Andy  G4JNT
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