[time-nuts] Cheap Frequency chip with serial output

Tim Shoppa tshoppa at gmail.com
Mon Oct 27 09:51:16 EDT 2014


Rather than read the bandswitch, a very common ham radio solution is to
have the frequency counter read both the VFO and the crystal oscillator
frequency and do the math with the last IF offset as part of the equation.

At least one unit can also reads the BFO frequency.

Although the low end PIC only has one counter, some gating can allow it to
sequentially read the VFO, crystal oscillator, and BFO and then do the math.

The AADE DFD2 is pretty sweet but they aren't currently selling the unit.
Still it is the right way to do it. http://www.aade.com/dfd2.htm

Tim N3QE

On Sat, Oct 25, 2014 at 10:26 PM, Giuseppe Marullo <giuseppe at marullo.it>
wrote:

> Hello,
> just wanted to know if there is any very cheap pre programmed pic or
> something similar to get frequency of a Yaesu FT-102 radio.
> I need it to know its frequency, either the VFO alone (sub 6MHz) or
> possibly its real rx and tx frequency (up to 30MHz).
> Using the VFO would be easier but then I will have to probe the mechanical
> band commutator.
> I know Arduino could be a solution, just wanted to know if something
> smaller is available, possibly with rs232.
> TIA
>
> Giuseppe Marullo
> IW2JWW  - JN45RQ
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