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M1BYT > KPC 03.10.03 05:27l 52 Lines 2323 Bytes #999 (0) @ WW
BID : 260957M1BYT
Read: GUEST
Subj: Re: Clock not update in KPC-3
Path: DB0AAB<DB0PV<DB0MRW<DB0RGB<OK0PPL<RZ6HXA<SP7MGD<WB0TAX<HA3PG<ON0BEL<
ZL2BAU<GB7FCR
Sent: 021018/1915Z @:GB7FCR.#16.GBR.EU #:22893 [Blackpool] FBB-7.03a $:260957M1
From: M1BYT@GB7FCR.#16.GBR.EU
To : KPC@WW
E20TCM Opined with considerable skill:-
> I'm a new user for KPC3 and have a question with clock function.
> I think the clock inside KPC3 is always ticking even I turn power off
> because there is a coin battery backing up. But it seems not like that.
> My KPC3 has been set with a new battery and DAYTIME to show
> the right time but I still got the wrong result if I turn it off for an
> hour or a day.
> Is this a normal clock function or malfunction?
Hi,
Apparently I wrongly assumed that the KPC3, like others in the
Kantronics range, had a battery backed clock chip inside.
Looking at the Kantronics website, I see that they sell an optional
extra for the KPC3 in the form of a clock kit. Now looking at picture on
the site of the 'kit', it seems to be just a single plug in IC of
perhaps 14 or 16 pins of the narrow spacing variety.... I assume the
crystal for the clock oscillator may be already fitted in the standard
KPC3's PCB?
I fancy this particular IC is identical to one I have designed around in
the dim and distant past. It was just a basic clock IC, with no CMOS
battery backed memory and no additional functions such as the alarms
found in the more complex clock IC which was later found in the IBM PC
(4016??).
I am almost certain that if I had a scratch around my junk pile, I would
find one. Now, if E20TCM wants to take a look inside his KPC3 and finds
an empty socket for a DIL IC, counts the number of pins, then I will see
if I can find him a suitable IC to fill the gap.
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º 73 from Harry, M1BYT @ GB7FCR.#16.GBR.EU.GBR º
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º International Museums Weekend 15+16th June 2002 º
º www.ukradioamateur.org/imw/index.html º
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º RAE CD ROM course Project and the Newcomers Intro º
º to amateur radio:- http://www.ukradioamateur.org/ º
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º QTH: Garforth, W. Yorks.. º Timed 19:15 º
º harry_m1byt@ntlworld.com º 18 Oct 2002 º
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