[time-nuts] TAPR TADD-2 PIC frequency divider
John Ackermann N8UR
jra at febo.com
Sat May 23 13:13:36 UTC 2009
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...
John
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