[time-nuts] Syncing time via a VGA connector

[Achim Gratz]

folkert writes:
> For fun I hooked up a TCXO to an Arduino. That Arduino then interfaces
> the TCXO to the I2C in the VGA connector and then with some magic code,
> it syncs the PPS signal to NTP.
> https://vanheusden.com/misc/blog/2019-11-07.php

On an actual VGA connector one of the monitor ID bits is still present
as "reserved", so if your graphics card still implements it you may have
an option of getting PPS in via that "GPIO".  I haven't looked if that
input might even allow interrupts.  Likewise, HDMI (but not DVI) has a
presence detect pin that should be usable as GPIO with some graphics
cards.


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

Factory and User Sound Singles for Waldorf Blofeld:
http://Synth.Stromeko.net/Downloads.html#WaldorfSounds