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Thanks, Wendell.
Nice to get a vote of confidence from someone who
has experience. I do not have a schematic drawn, its done in my head and
on the PC board drawing tool. However, I intend to fix that as I found the
PC board SW I am using also has a schematic drawer which can then guide you to
connecting the correct points on the PC board drawing. Remind me in about
a week or son and I'll be happy to send you the schematic.
It took me from May of this year to Dec to finally
learn enough to write the code and program the Microchip - but, someone more
familiar with digital things would probably find it much quicker. I was
fortunate to finally find a Pascal Compiler which was much easier than assembly
- but, I still had to write some embedded assembly code for functions
(mostly math) that the compiler does not yet have, Ugh!.
It would be fairly easy (I think) to add a fuel
quantity function. The traditional fuel sender is simply a varying DC
voltage which I could port to one of the A/D pins on the chip and then
have a look up table for what voltage = how much fuel. Some of the
capacitive fuel measuring systems are a bit different and they might better to
integrate.
Ed
----- Original Message -----
Sent: Friday, February 18, 2005 9:57
AM
Subject: [FlyRotary] Re: Digital Fuel
Monitoring System
Looks good to me, been in electronics for 40
years. I made up a proto-type digital fuel gauge last summer, didn't
make a PCB yet. Mine is just gal. read out on LEDs. Has a little temp drift
but may not need to worry about it.
If you don't mind I'd like a schematic, but I have no
way to program a microprocessor so stay away from them. If you would sell the
programmed processor I might switch to it to have bells and
whistles.
Wendell
Had to borrow the wife's large, lighted sewing
magnifying apparatus - can do alright on the hole-through components, but
those surface mount chips are just too small for old eyes {:>). If
the circuit checks out tomorrow I will apply power and see if I can get the
chip programmed.
Ed
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