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'Data logger'
1997\11\06@170901 by TONY NIXON 54964

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Two heads are definitely better than one.

Well done

Tony


Just when I thought I knew it all,
I learned that I didn't.


'data logger'
1998\05\08@034826 by Wolfgang Willenbrink
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G day to all Picler!

Is there anyone on the WAN who has build a data-logger with a 16x71 in
cunjunction
with eeproms or flash-rams?

Hop hearing from you....

Regards

Wolfgang

1998\05\08@113509 by Matt Bonner

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Wolfgang Willenbrink wrote:
> Is there anyone on the WAN who has build a data-logger with a 16x71 in
> cunjunction
> with eeproms or flash-rams?
>
That's _all_ I do.  (Except with a '74 and a '61.)  Any specific
questions?

Well....sometimes I do other stuff - I do have a life. 8-)

--Matt


'Data logger'
2002\08\04@161239 by Koos du Preez
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I'm new in Picmicro and electronics and want to build a Data logger about the size of a standard calculator.
It must be able to Store round about 300 ID Numbers and a value for each ID Number and I must be able to download and upload to the PC with RS232.

Is this a dificult task, and where do I start?.

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2002\08\04@163147 by Byron A Jeff
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On Mon, Aug 05, 2002 at 10:01:34AM +0200, Koos du Preez wrote:
> I'm new in Picmicro and electronics and want to build a Data logger about
> the size of a standard calculator.

So big?

> It must be able to Store round about 300 ID Numbers and a value for each ID
> Number...

What size ID numbers (I guess 16 bits should be enough)? What kind of values?
where are the values coming from? What is the frequency of sampling.

> ...and I must be able to download and upload to the PC with RS232.
>
> Is this a dificult task,

Not enough information to give an answer to that.

>and where do I start?.

Start with a 16F876. With it's compact packaging (28 pins), self modifyable
program memory, and built in USART, you should be able to handle the memory
storage and data transmission with little more than the part and a RS232
level converter.

As to the rest, you didn't provide enough information.

BAJ

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2002\08\05@010059 by Koos du Preez

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Yes 16 bit ID Number will be good enough.
The values would not be greater than 50, but the device must have buttons
like a calculator so that the user must manualy enter an ID Number, and the
device must look up the ID Number and if it exist then it must ask for it's
value and the user must then enter the value.  Actualy it must be able to
stor 4 values for each ID Number.
I actualy want to help a dairy farmer who got the PC software with all his
animals and each animal have got an ID Number. Then he must be able to
updload all the ID Numbers and take the device with him where he enters the
ID Number and the device must look up the number and ask for it's value
(amount of milk).
But some of the farmers milk the cows 3 or 4 time a day.  When he is
finished he must be able to go back to the pc and upload the days milk.

Thx

{Original Message removed}

2002\08\05@013459 by Tony Nixon

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Koos du Preez wrote:
>
> Yes 16 bit ID Number will be good enough.
> The values would not be greater than 50, but the device must have buttons
> like a calculator so that the user must manualy enter an ID Number, and the
> device must look up the ID Number and if it exist then it must ask for it's
> value and the user must then enter the value.  Actualy it must be able to
> stor 4 values for each ID Number.
> I actualy want to help a dairy farmer who got the PC software with all his
> animals and each animal have got an ID Number. Then he must be able to
> updload all the ID Numbers and take the device with him where he enters the
> ID Number and the device must look up the number and ask for it's value
> (amount of milk).
> But some of the farmers milk the cows 3 or 4 time a day.  When he is
> finished he must be able to go back to the pc and upload the days milk.
>
> Thx

Sounds to me like a 16F873 with bootloader, external EEPROM memory, a
LCD display, a 12 or 16 key keypad, a RS232 port and a 9V battery which
should all fit in a small hand held case. Easy peezy Japanesy. Just got
to do the software which won't be that hard.

Stepping through a simple menu sounds like the go.


> USE
 UPLOAD


[USE]

ENTER ID

> 0143 #

ENTER MILK RUN 1..4

> 1 #

ENTER MILK VOLUME

> 5 #


ENTER ID

0987 #

etc...


[UPLOAD]

CONNECTING TO PC

UPLOADING...

COMPLETE

> USE
 UPLOAD

etc...

* key can be used to delete data

--
Best regards

Tony

mICros
http://www.bubblesoftonline.com
salesspamKILLspambubblesoftonline.com

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2002\08\05@125812 by Koos du Preez

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Is this all I need ?
       |
      V
Sounds to me like a 16F873 with bootloader, external EEPROM memory, a
LCD display, a 12 or 16 key keypad, a RS232 port and a 9V battery which
should all fit in a small hand held case. Easy peezy Japanesy. Just got
to do the software which won't be that hard.


{Original Message removed}

2002\08\05@190300 by Tony Nixon

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Koos du Preez wrote:
>
> Is this all I need ?
>         |
>        V
> Sounds to me like a 16F873 with bootloader, external EEPROM memory, a
> LCD display, a 12 or 16 key keypad, a RS232 port and a 9V battery which
> should all fit in a small hand held case. Easy peezy Japanesy. Just got
> to do the software which won't be that hard.

It's up to you and what you decide that you really need. That was just
thoughts off the top of my head. Usually in projects like these the core
software is easy (data logging) but the user interface adds the harder
part.

I guess you will also need a PC terminal program to capture the data.

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Best regards

Tony

mICros
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2002\08\05@194141 by Welch, Ken

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might look at John Andrews PICos project -- if you can considering using the
17C756

www.piclist.com/techref/piclist/andrewspicos/index.htm?key=%5BPIC%5D%
3A+I2C+Bus+of+PIC16F877%27s&from=


{Original Message removed}

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