Re: [time-nuts] Anybody want a Thunderbolt power supply?

> On Aug 30, 2016, at 9:26 PM, Mark Sims wrote: > > The -12V is used to drive the RS-232 signals... it also eventually gets to > the EFC dac so it can swing below ground. Also, the +12V gets to the DAC. > Pay close attention to generating noise on these lines. I’ve

[time-nuts] Efratom M-100 Rubidium

A friend gave me an Efratom M-100 Rubidium standard to check out and calibrate. I found a couple manuals to download, and they appear to be pretty complete. Even have schematics!! The unit belonging to my friend is p/n 70502-7. The manuals appear to be for p/n 70502-1. Close to the front of

[time-nuts] Anybody want a Thunderbolt power supply?

A little board to generate -12 and +5 from a 15 watt 12 VDC input wouldn’t be too hard to design. If I put one out for $25, would anyone like one? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

[time-nuts] Anybody want a Thunderbolt power supply?

The -12V is used to drive the RS-232 signals... it also eventually gets to the EFC dac so it can swing below ground. Also, the +12V gets to the DAC. Pay close attention to generating noise on these lines. Also, when I did Lady Heather's temperature control PID (with great help from Warren

[time-nuts] Sunrise, solar noon, sunset and the Equation of Time

I recently added code to Lady Heather to precisely calculate the sun position, sunrise/solar noon/sunset times and the Equation of Time... Egad, what a deep, dark rabbit hole that leads one down. And woe be unto thee that trusts any of the online calculators. Results can be over 10 minutes