3 ms·
https://en.wikipedia.org/wiki/Timex_Datalink#Optical_sensor https://en.wikipedia.org/wiki/Timex_Datalink#Optical_sensor
by ramses0 8y ago
https://en.wikipedia.org/wiki/Timex_Datalink#Optical_sensor https://en.wikipedia.org/wiki/Timex_Datalink#Optical_sensor