[time-nuts] Buffering a PPS signal

[Mark Sims]

While you're at it,  add an ATMEGA328 processor and a 250 ps res/256 step delay line.   The processor reads the timing message,  picks off the sawtooth correction factor,  converts it to an 8-bit value that it output on a port to the delay line.  The 1PPS signal clocks the port into the delay line for sawtooth correction.   (This all assumes that the correction factor applies to the NEXT 1PPS that is output (the PPS correction is not documented...  the time field in the message  applies to the previous 1PPS pulse).
Another useful feature might be a fan driver FET controlled by the computer RTS and DTR lines.  That way Lady Heather can do the temperature control thing...  RTS is enable,  DTR is heat/cool.  Since a fan only cools,  you could skip using the RTS signal.