Building the atomic clock I’ve always wanted
dzombak.com
Building the atomic clock I’ve always wanted
1–10 of 18 posts
Re: Building the atomic clock I’ve always wanted
#2Link redirects back to HN
Re: Building the atomic clock I’ve always wanted
#3Because it keeps redirecting: https://archive.ph/3wdLj
Re: Building the atomic clock I’ve always wanted
#4Ooo... That RC divider on the PPS concerns me. All the money was put into making that edge right on the money, and reliably so. I'm not sure that guarantee will hold out when run through a load. Warming the resistor or capacitor, for example, should change the time constant enough to be noticable.
I've had lots of luck with 74LVC series ICs as logic level translators from 5V to 3.3V. I can do a little nosing around to see if they can handle 400 ns pulses, but they should handle just great.
Re: Building the atomic clock I’ve always wanted
#5Because it keeps redirecting: https://archive.ph/3wdLj
Inputting the URL directly works, just not when clicking on the title here on HN.
https://www.dzombak.com/blog/2021/12/Building-the-atomic-clo...
AND, it looks like it still redirects if you click on the link in my comment.
Re: Building the atomic clock I’ve always wanted
#6Ooo... That RC divider on the PPS concerns me. All the money was put into making that edge right on the money, and reliably so. I'm not sure that guarantee will hold out when run through a load. Warming the resistor or capacitor, for example, should change the time constant enough to be noticable. I've had lots of luck with 74LVC series ICs as logic level translators from 5V to 3.3V. I can do a little nosing around t…
Agreed - I just took a look at a sn74lv1t34 datasheet. It should be able switch in ~5ns into a 30pf load.
Re: Building the atomic clock I’ve always wanted
#7Because it keeps redirecting: https://archive.ph/3wdLj
He has example code (presumably active on his server) for how to do this -
https://www.dzombak.com/blog/2021/02/Redirecting-Hacker-News... :)
Re: Building the atomic clock I’ve always wanted
#8Something is off with this link.
Re: Building the atomic clock I’ve always wanted
#9Because it keeps redirecting: https://archive.ph/3wdLj
He has example code (presumably active on his server) for how to do this - https://www.dzombak.com/blog/2021/02/Redirecting-Hacker-News... :)
…and now I’m upvoting purely because he’s trying to redirect hn readers away. One of us is being played but I’m not sure which tbh.
Re: Building the atomic clock I’ve always wanted
#10Earlier quoted context omitted.
He has example code (presumably active on his server) for how to do this - https://www.dzombak.com/blog/2021/02/Redirecting-Hacker-News... :)
…and now I’m upvoting purely because he’s trying to redirect hn readers away. One of us is being played but I’m not sure which tbh.
There's a good chance his server can't handle HN level traffic