Subject: Re: Need Recommendation for Time-Clock IC
Date: Thu, 21 Nov 2002 15:38:01 +0100
NNTP-Posting-Date: Thu, 21 Nov 2002 14:40:22 +0000 (UTC)
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> I'm not familiar with microcontrollers. Wouldn't this be doable with all
> digital? Or, failing that, is there a dedicated real-time clock IC?
PCF8583 is a dedicated real-time clock, but certainly not with all
functionality that you mentioned.
It is possible to make all this in hardware, but it is much, much, much
easier with microcontrollers.
(That's the reason they invented it anyway).
One easy way to do it would be using PIC 16F876 or similar and PicBasic
pro - it allready has statements for I2C
communication, and talking to PCF8583 takes only a few lines of code.
> In article , "Gnekker"
> > "Doug Johnson" wrote in message
> > news:firstname.lastname@example.org...
> > > I'm starting design on a circuit that will use a real-time (24 hours,
> > > minutes and seconds) clock with multiple displays and stoppable
> > > registers (the idea is to have one display showing the actual time of
> > > day, and then 5 other displays with the same time, but each able to be
> > > "frozen" with the push of a button. it will be used to record the
> > > times of subsequent events. Once the times are transferred to paper,
> > > they can be cleared.) I learned digital electronics in college about
> > > 10 years ago, but haven't been working much in the field, so I'm
> > > out-of-date on devices. I'm looking for a recommendation for a clock
> > > IC to use, and any other tips or circuits you feel might help. thanks
> > > in advance for helping an amateur!
> > One option could be PCF8583 tied to some controller, 8051, PIC, atmel or
> > whatever you prefer.
> > Cheers,
> > Gnekker