I also though how nice it would be to have a data
logger and it does not appear to be that difficult for

collecting

data

and
storing x amount of time in epprom - or (I haven't explored

it)

but

persumably there are just eeprom chips out there for storage

of

massive

amounts of data.

You might consider compact flash. It would be easily removable

from

the plane for downloading into a computer at home. I just saw a 1

gig

CF, and that is a massive amount of data. 128 Mb is a standard

consumer

item now.

David

David, do you have a web site for the item or just search "Compact

Flash"?

Ed

I suspect the flash card interface is PC bus oriented.
My guess it is has a 32 bit multiplexed address and data buss.
As such it is too complicated to interface to for an embedded
Harvard architecture  processors such as the PIC.
I could be wrong. There could be a single chip solution out
there for this problem. I checked in the latest issue of Nuts
and Volts and Micromint and saw nothing. I think you would be better

off

going with the serial EEPROM 8 pin mini dip and download
the data through an RS232. Off the shelf RS232 to USB adapters
are also available.

Paul Lamar

I am attempting to use as much as I can of the chip.  I am able to store
default values in the EEPROM area - such as fuel remaining, Fuel Reserve,
etc.  I've decided to also used the A/D feature to drive the air/fuel
indicator - may not have it up and running on the first go around, but

will

have the board wired for it.   Does not look like interface to a seperate
EEPROM chip would be difficult - but, then I have not gotten that far yet

in

my research.

Probably bitting off more than I should - as all the guidance says start
with a simple program, but at least as I work out the bugs I feel like

I'm

making progress in both the learning and the program.  Now if I can just

get

the 255 bits from an 8 bit A/D to correlate to LED lights driven by the 7
Seg driver which also drives the 7 seg numeric displays and remember to
multiplex 7 digits (3 digits for flow rate and fuel usage each = 6 plus

the

1 for driving the LED) I'll be on my way. {:>).

Lucky I have a high tolerance for frustration {:>)

Ed

You are not using a simple 7 segment LED are you Ed?
I have not done one of those for the last thirty years :-)
Shessss! this is the 21st century. What you need is a smart
display. You send it ASCII and it does the rest.
HP makes a super bright version that all the high buck avionics people
use. HDSP 2112 or HDSP 2XXX. Newark Electronics. Also second
sourced by Agilent Technologies.
http://www.semiconductor.agilent.com

There is plenty of help on here ask for it.

Paul Lamar

Paul/Ed,
Maybe I missed it on the thread. What PIC chip are you using?
Thanks
Dean

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