3 ms·
It doesn't do ntp though, and the 30s/month spec is not not very impressive (over 5m drift in a year!)
by zokier 6y ago
It doesn't do ntp though, and the 30s/month spec is not not very impressive (over 5m drift in a year!)
- tyingq 6y agoI was thinking it just does the the work of providing an interface to the cheap controller, so you could replace the attiny85 with something like what's shown in this article. Though you're limited to pulses that drive the second hand. So you would have to keep track of pulses and hold one back or add an extra now and then. Something like waking up every half second, calculating current ntp time minus last known ntp time and sending pulses to match. Daylight savings that goes back would be an issue for that hour, best you could do is wait, or send a bunch of pulses to go around as quick as the stepper allows.