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'datalogger'
1998\05\08@070523 by Wolfgang Feller

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Hello Wolfgang,

I build dataloggers (PIC 16C74 and IIC- EEProms, RTC, 18- Bit ADC) for measuring
temperature, humidity and so on at the university of Trier.
Maybe I can help you. What's your problem?


Wolfgang Feller


spam_OUTFellerTakeThisOuTspamtech.uni-trier.de


'Datalogger'
1998\09\20@143955 by Peter Beykirch
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<DIV><FONT color=#000000 size=2>I have to build a Dataloger as a Project. In
very rough term's I have to store Analog Data, sampled with 8 bit. The Date will
have to be sampled with a frequency of 100 -200 Hz and the results stored in RAM
to provide Buffering for at least 30 seconds. Can anyone help me with such a
project or give me some sample files of how to implement this as I am new to
Microprocessor programming.</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT>&nbsp;</DIV>
<DIV><FONT color=#000000 size=2>Thank You </FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT>&nbsp;</DIV>
<DIV><FONT color=#000000 size=2>Peter Beykirch</FONT></DIV>
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<DIV><FONT size=2><A
href=".....beykirchKILLspamspam@spam@mweb.co.za">beykirchspamKILLspammweb.co.za</A></FONT></DIV></BODY></HTML>

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1998\09\21@114618 by Andy Kunz

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>with a frequency of 100 -200 Hz and the results stored in RAM  to provide

100Hz * 1byte/sample = 100 bytes/second.  More than fits in most PICs.  I
suggest you select another processor, or change your requirements.

Andy

==================================================================
Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA
==================================================================

1998\09\21@124931 by Mark Willis

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Andy Kunz wrote:
>
> >with a frequency of 100 -200 Hz and the results stored in RAM  to provide
>
> 100Hz * 1byte/sample = 100 bytes/second.  More than fits in most PICs.  I
> suggest you select another processor, or change your requirements.
>
> Andy
>
> ==================================================================
> Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA
> ==================================================================

 The Atmel AT45D081 Flash might suffice for storage here, though it's
definitely *not* RAM <G>  Or SEEProms like the 24LC256.  The AT45 series
is definitely harder to interface than the 24C series SEE's are...

 Mark, .....mwillisKILLspamspam.....nwlink.com

1998\09\22@093621 by Andy Kunz

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At 09:42 AM 9/21/98 -0700, you wrote:
>Andy Kunz wrote:
>>
>> >with a frequency of 100 -200 Hz and the results stored in RAM  to provide
>>
>> 100Hz * 1byte/sample = 100 bytes/second.  More than fits in most PICs.  I
>> suggest you select another processor, or change your requirements.
>>
>> Andy
>>
>> ==================================================================
>> Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA
>> ==================================================================
>
>  The Atmel AT45D081 Flash might suffice for storage here, though it's
>definitely *not* RAM <G>  Or SEEProms like the 24LC256.  The AT45 series
>is definitely harder to interface than the 24C series SEE's are...

Hi, Mark.

Yup, that's exactly the part I use in my data logger.

Andy


==================================================================
Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA
==================================================================

1998\09\22@104414 by Nicholas Uloth

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At 09:01 AM 9/22/98 -0400, you wrote:
>At 09:42 AM 9/21/98 -0700, you wrote:
>>Andy Kunz wrote:
>>>
>>> >with a frequency of 100 -200 Hz and the results stored in RAM  to provide
>>>
>>> 100Hz * 1byte/sample = 100 bytes/second.  More than fits in most PICs.  I
>>> suggest you select another processor, or change your requirements.
>>>
>>> Andy
>>>
>>> ==================================================================
>>> Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA
>>> ==================================================================
>>
>>  The Atmel AT45D081 Flash might suffice for storage here, though it's
>>definitely *not* RAM <G>  Or SEEProms like the 24LC256.  The AT45 series
>>is definitely harder to interface than the 24C series SEE's are...

The the SEEPROMs are relatively easy to interface, they do a page write in
2ms thus plus overheads it should be feasable.
Pick a PIC with an I2C bus interface to simplify things.


Nic

1998\09\24@070556 by paulb

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Nicholas Uloth wrote:

> Pick a PIC with an I2C bus interface to simplify things.

 What are you suggesting here exactly?
--
 Cheers,
       Paul B.


'Datalogger'
2000\05\12@070700 by Ramón Pérez Hernández
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Can you help me on designing a datalogger with a PIC?
Requirements:
   16 (or more) channel input A/D
   8 (or more) channel digital input/output
   as much as possible storage RAM
   stand alone operation
   interface with PC
   etc.
Perhaps, can I use a 16F84 with LTC1298 or MCP3208CIP A/D (with some
multiplexing), a MAX-RS232, DS1302 RTC and 24LCXX EEPROM ?
I try to build it on a SIMMSTICK bus (http://www.simmstick.com) for let
it modular. A good idea?
I«m a beginner, of course.
Any URL, pdf, appnotes etc, will be apreciated. Thanks in advance.

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