[time-nuts] locate 6 digit digital clock

[Collins, Graham]

Now that is very high in the cool factor!

This has been an interesting thread and got me to thinking about
building something similar for myself.

A quick search for Arduino and LED or LCD Clock returned many hits and
lots of interesting ideas for rolling my own.

For those not acquainted Arduino it is a simple development/learning
platform based on an Atmel chip which has become very popular for
hacking and playing around with. So popular in fact that you can now get
PIC and a 75 MHz ARM based Arduino like compatible boards - same form
factor and common IDE. 

You could for example take an Arduino board, plug on a LCD display
shield, add a simple "sketch" (aka program) and have a functional clock,
- add some software to sync to a gps 1 pps (etc, etc). 

The plug on boards with different functionalities are called shields and
you can get pretty much whatever you would like - Ethernet, wireless,
Bluetooth, etc. Do a quick general Google search or have a look on eBay;
you might be surprised.

Cheers, Graham ve3gtc



-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Poul-Henning Kamp
Sent: June 8, 2011 15:11
To: Flemming Larsen; Discussion of precise time and frequency
measurement
Subject: Re: [time-nuts] locate 6 digit digital clock

In message <985823.67392.qm at web24819.mail.ird.yahoo.com>, Flemming
Larsen write
s:

I recently turned a HP frequency counter into a style-fitting
clock for our workshop in Danish Computer History Association:

	http://ing.dk/artikel/119043-ur-til-tiden

(Google translate does a decent job)

I used a PIC18mumble and a DS3231 RTC.

Since the RTC also tracks day-month-year, it was trivial to let it
run in UTC and program the pic18 to figure out timezone + DST.

Even if you use a uP to count time, it would make good sense to
include a RTC so you don't have to reset the clock after each
power-glitch.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by
incompetence.
the instructions there.