Electronics Forum / Electronics / July 2007

Have a kind of difficult question.
im looking for RTC chips for a micro controller project, i need an
accurat way of keeping time as well as interrupt alarms and can use
I2C or SPI for the application, my problem is understanding the

Have any former contributors to EA received a rather mysterious cheque
from the Federal Publishing Company recently?
Dave.

Introducing myself to microprocessors and looking at Microchip's Pic series.
Absolute beginner. Keep seeing references to 12c. What is 12c? Can anyone
help .I've googled for an explanation, can't find one. TIA.

Hi me again, I watched the footy tonight, and I have a 42inch plasma.
I noticed the channel 9 logo was in the right hand corner, but it was not in
the corner, it was way in.
Have I got the aspect ratio set wrong, I switched on my small tv, and the

And here is the response I just got back:
email and person's name munged.
Don...
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Hi I am getting a Plasma soon, and was told by the TV shop, that I should
get these you beaut $150 leads, that give out a much better picture than the
standard av leads.
Is this true, or is it just to get more money out of me ?

Hi I got my Panasonic Plasma today, at present I don't have digital, so its
analogue.
So when I was watching some shows, were not full screen.
Also on nine, just Temptation was full screen, however when they went to an

Can somebody please give me assistance with a circuit to power from 12v a
variable 1.5 to 3v circuit.  Presently the small fan is powered by 2 x D
cells and runs for around 6 hours.  I would like to have a potentiometer
that goes from 1.5 to 3.0v.

is more powerful at a "FULLER" Voltage / Amperage -
then why do they "slow" down as they get bigger. Is this -
something to do with "Atmospheric Conditions?" Does the
atmosphere somehow guide electrons of high-voltage as a

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I have a fairly mature Panasonic NV-DS5EN camcoder. It plugs into an
interface unit with Audio L/R video RCA sockets, and also has a pot named
S-Video out, and a cable for this. No mention of S-Video IN. So is the IN
function incorporated in the one S-Vide mini DIN(?) plug?  ...

Hi I am in the market for a new TV, can someone give me the pro's and con's
of each.
Thanks kindly

I need to make a relay switch on 1 second after a 12VDC line comes on, but switch off immediately the 12VDC goes off.  What's the best way to do this?  If you need to know why I want this, see the paragraph below:
I have a solar power setup and wish to switch the load between the ...

I asked this question on an electronics forum and it was suggested
that I ask it here. Anyways, here's my problem:
I'm trying to make an LCD controller for a 18 bit LCD panel that will
take a DVI or VGA input (yes, I know I am insane). I've found an

Dead Loewe Arcada 8672 ZP (article number 57437 L32). This is a 100Hz 4:3
CRT TV. I think it is from 1997 judging by the "By 634/97/Ro" on the back.
No picture or menu displayed.
Funny black mark on the back of the tube