Le 12 nov. 2013 à 03:13, Chris Albertson a écrit :
You want to drive the RTC with an external PPS to get time/date into an
Arduino?
Why not feed the PPS to the Arduino and have it compute date and time?
It is really not that hard to count seconds. You don't really need an
external chip to
hmur...@megapathdsl.net said:
A 32 KHz clock is also useful for running (well, crawling) in low power
mode.
That can be important when running off batteries.
I suspect the reason that chips don't have an option to drive the RTC from
a
1 PPS input is that there is no volume in that corner
Thanks for the input all, I think the target market for what I have in mind
is hobbyist more than time nut. I also believe the Sparkfun product I
originally pointed to is an example of a mass market offering that is 'good
enough' for almost anyone. There is a small niche of those wanting to use
Hi:
Two exhibits based on time:
March 6 - December 6, 2013
Time, Life Matter: Science in Cambridge
and
Time Time Again: How Science Culture Shape the Past, Present, Future
http://www.fas.harvard.edu/~hsdept/chsi-exhibitions.html
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
just a thing to solder-up on a weekend
Never underestimate the attraction of something you can solder-up on a
weekend. It kept Heathkit alive for years. But if you're trying to make
money from it, the problem is finding a market and marketable ideas.
Bob
On Mon, 11 Nov 2013 20:44:59 +, cfo wrote:
I have finally succeded in making linux-gpib build and load the
agilent_82357a_gpib module.
I have put the howto online here
http://www.eevblog.com/forum/reviews/using-a-raspberry-pi-with-linux-gpib-
and-a-beiming-or-agilent-usb-gpib-adapter/
The microchip pics on the bench here actually have the oscillators in
them for the 32Khz xtal. That is, the gain and feedback to make the
crystal run are in them. All that is needed is some capacitance to
ground. This is why the SOSC (Secondary Oscillator) uses two pins. You
can also use a single
Dr. Sara Schechner, curator, just posted this on the sundial reflector:
The Collection of Historical Scientific Instruments (CHSI) at Harvard
University would like to invite you to an informal gathering during this
year's HSS Annual Meeting, held in Boston. We will open our museum
Hi Larry:
Where did you see the Dipleidoscope?
http://www.prc68.com/I/Dent.shtml
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
Larry McDavid wrote:
Dr. Sara Schechner, curator, just posted this on the sundial reflector:
The
