[Lowfer] TAG and Bill

Sun, 9 Feb 2003 21:33:18 -0600 (CST)

Hmmm... you know, I've never used a PIC before, and I've long wanted to.  
That page was all 
non-english characters to me (no windows computers) but I think I can do 
one anyway.  I did quite a bit of assembly language programming in the 
late '70s (8080, Z80) and it looks like their simple risc instruction sets 
are easy.

What do you do -- write the code, and then they burn it for you that way 
(hope you don't have any bugs :)  ?

On Sun, 9 Feb 2003, Stewart Nelson wrote:

> Hi Eric,
> 
> It is relatively easy to build a timer that uses a crystal
> oscillator and a one-chip micro such as a PIC.  This would
> save you the trouble of wiring up many divider chips, and
> would be much more flexible, if you wanted to change the
> behavior of your beacon in the future.
> 
> One such design is at http://www.picfun.com/equipj39.html .
> This page is in Japanese, but if you have Win 2000 or XP it
> should display fine.  On older OS you may need to install
> fonts or a language pack.  Even if you don't understand the
> text, you can get most of what you need to know from the
> pictures, schematic, and source code (with English comments!).
> The board pattern, schematic, and code is all available for
> free download.
> 
> This unit uses two optically coupled triacs to permit
> small AC loads to be switched.  You could eliminate them,
> if a logic level output is all you need.  In theory, one
> could also omit the LCD display, but you need some feedback
> to know that the settings have be properly made.  You
> could modify the code to send the "display" to a PC via
> a serial port, or hard code your desired behavior, and
> just plug the device in at the top of the hour.
> 
> I have some of the TCXO modules used by this project, and
> would be glad to send you one.
> 
> There are many other PIC projects on the Net, and you could
> probably find a timer, in English, well suited to your
> application.
> 
> 73,
> 
> Stewart KK7KA
> 
> ----- Original Message ----- 
> From: "Eric Smith" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, February 09, 2003 11:02 AM
> Subject: [Lowfer] TAG and Bill
> 
> 
> > Rumor has it you guys might be able to point me to a circuit that would 
> > toggle an output on the hour and half-hour.  I'd like to use the toggle to 
> > switch one of my beacons (not LF) between two modes.
> > 
> > I thought of using a 555, but while I could get 30 minutes of timing out 
> > of one, it wouldn't be sync'ed to the hour and half hour, which I would 
> > prefer.
> > 
> > Any suggestions?  I know someone is already switching modes on the hour 
> > and half hour.  How is it done?
> > 
> > Thanks in advance!
> > 
> > Regards,
> > Eric
> 
> 
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