[time-nuts] TAPR TADD-2 PIC frequency divider

Magnus Danielson magnus at rubidium.dyndns.org
Sat May 23 13:16:21 UTC 2009


John Ackermann N8UR skrev:
> Magnus Danielson said the following on 05/23/2009 07:45 AM:
> 
>>> Since the TADD enclosure has two DB-9 cutouts, one nice option (which 
>>> I haven't tried yet) would be to wire the LED, the 5/10 MHz jumper, 
>>> and the ARM switch connections to a DB-9 and mount that in the 
>>> enclosure, then mount the LEDs and jumpers to a mating connector.
>>
>> I was actually contemplating the same. I think that would be a good 
>> solution. It would also allow for remote control and monitoring. 
>> Tossing in a PPS in there should not be hard and would make sense.
> 
> There's a "secret" extra PPS output available that could be used on the 
> DB-9.  Look behind the ARM connector and you'll see a pair of pads 
> labeled "AUX PPS".  Those are a simple PPS signal buffered by a leftover 
> gate on the 74AC14.  Not a nice low Z output like the primary ones, but 
> potentially useful...

It was the AUX PPS I had in mind.

Cheers,
Magnus



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