battery operated data logging
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Posts: 46,084
Hi all,
I have a need for a 4 channel data logger that will be left on site
and run by battery. possibly with solar charging, possibly just an
occosial charging.
question is, what is a good way to pull the data ? or to store the
data ?
palm ?
memory card of some type ?
possibly the Stashe-DAQ ? (if an when it comes on the market)
anybody have any links to those who have done something like this ?
of course, a follow up with by what do you use on the PC to read and
analyze the data ?
Dave
I have a need for a 4 channel data logger that will be left on site
and run by battery. possibly with solar charging, possibly just an
occosial charging.
question is, what is a good way to pull the data ? or to store the
data ?
palm ?
memory card of some type ?
possibly the Stashe-DAQ ? (if an when it comes on the market)
anybody have any links to those who have done something like this ?
of course, a follow up with by what do you use on the PC to read and
analyze the data ?
Dave
Comments
www.onsetcomputer.com/
I have used their data loggers with great success. They are inexpensive, have
great support and can run over a year......
Dave Mucha <davemucha@j...> wrote:
Hi all,
I have a need for a 4 channel data logger that will be left on site
and run by battery. possibly with solar charging, possibly just an
occosial charging.
question is, what is a good way to pull the data ? or to store the
data ?
palm ?
memory card of some type ?
possibly the Stashe-DAQ ? (if an when it comes on the market)
anybody have any links to those who have done something like this ?
of course, a follow up with by what do you use on the PC to read and
analyze the data ?
Dave
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> I would suggest you try looking at the following:
> www.onsetcomputer.com/
I got one of their loggers for temperature and for a test, I stuck it
in the fridge.
it took about 45 minutes to clear 80% of the error and was still
ramping towards temperature at an hour.
A half decent sensor should be able to monitor the compressor on
cycles as temperature dips, this never even made it to the actual
refriderator temperature.
it worked neat at room temperature though.
I'll give them another look.
Dave
<trygve.henriksen@v...> wrote:
> Greetings!
>
> Are you trying to measure temperature?
> If so, why not get four 'ThermoChron' iButtons from DalSemi?
I wish it was that easy. pressures too. 0-500 PSI, need about 1 PSI
resoultion so a 12 bit ADC is needed.
I think I can do the hardware, BS2, ADC and on-board memory, but I'm
not sure how to transfer the data to another device easily. A USB to
PALM would be nice : ) or something like a memory stick/smartcard
writer.
and, then the software. how to display it in pretty pictures and
graphs. I have been coorsponding with Dave at
http://www.rhombusinc.com/microgui.html
nice stuff for PC screen displays, but ultimatly, I also need to get
up to around 40 points. : )
anyone have any ides how to display 40 temperaturs on a PC screen in
a GUI format ? lines of text are not as fun to look at.
Dave
my.execpc.com/~fdeck/meld/
Francis Deck makes a 4 or 5 channel data acquisition system based on Palm
output. I tried it and it works. Moreover - it is an open system in the
best sense of the expression...
Dov
Original Message
From: "Dave Mucha" <davemucha@j...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, August 25, 2003 16:13
Subject: [noparse][[/noparse]basicstamps] Re: battery operated data logging
> --- In basicstamps@yahoogroups.com, "Trygve Henriksen"
> <trygve.henriksen@v...> wrote:
> > Greetings!
> >
> > Are you trying to measure temperature?
> > If so, why not get four 'ThermoChron' iButtons from DalSemi?
>
>
> I wish it was that easy. pressures too. 0-500 PSI, need about 1 PSI
> resoultion so a 12 bit ADC is needed.
>
> I think I can do the hardware, BS2, ADC and on-board memory, but I'm
> not sure how to transfer the data to another device easily. A USB to
> PALM would be nice : ) or something like a memory stick/smartcard
> writer.
>
> and, then the software. how to display it in pretty pictures and
> graphs. I have been coorsponding with Dave at
> http://www.rhombusinc.com/microgui.html
>
> nice stuff for PC screen displays, but ultimatly, I also need to get
> up to around 40 points. : )
>
> anyone have any ides how to display 40 temperaturs on a PC screen in
> a GUI format ? lines of text are not as fun to look at.
>
> Dave
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
You might check out: http://www.microdaq.com/products/voltage.php
Buy an external pressure transducer and hook it up to one of their
voltage or current loggers ($200) and you'd be in business. They also
have a nice graphical interface ($100) that runs on a PC to display the
data.
They also sell temperature loggers ($100) that use the same graphical
interface.
http://www.microdaq.com/products/temperature.php
If you are wanting to 'roll your own' please disregard!
Regards,
amg
PS: I have a used 1000 psi Barksdale transducer sitting on my desk. No
idea if it works or not, but you're welcome to it. (Respond off-list if
interested.)
On Mon, 25 Aug 2003 13:13:08 -0000 "Dave Mucha" <davemucha@j...>
writes:
> I wish it was that easy. pressures too. 0-500 PSI, need about 1 PSI
> resoultion so a 12 bit ADC is needed.
>
> I think I can do the hardware, BS2, ADC and on-board memory, but I'm
>
> not sure how to transfer the data to another device easily. A USB
> to PALM would be nice : ) or something like a memory stick/smartcard
> writer.
>
> and, then the software. how to display it in pretty pictures and
> graphs. I have been coorsponding with Dave at
> http://www.rhombusinc.com/microgui.html
>
> nice stuff for PC screen displays, but ultimatly, I also need to get
>
> up to around 40 points. : )
>
> anyone have any ides how to display 40 temperaturs on a PC screen in
>
> a GUI format ? lines of text are not as fun to look at.
>
> Dave
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>resoultion so a 12 bit ADC is needed.
>
>I think I can do the hardware, BS2, ADC and on-board memory, but I'm
>not sure how to transfer the data to another device easily. A USB to
>PALM would be nice : ) or something like a memory stick/smartcard
>writer.
The Palm USB interface is, unfortunately, slave only. It cannot be
used as the USB master in relation to other devices. Some Palm
models still do have an RS232 serial interface, and that is nice for
field data offloads, and on some of them that can go directly to a SD
card. How much data are you talking about? It may not take
extraordinarily long to transfer on-board memory via RS232, even at
Stamp speeds, unless you really are getting into memory stick
capacities.
If your data is text formatted, you can offload it into a PC using
hyperterminal, or into a Palm using "Online", and then import it
directly into Excel. It can handle 40 temperatures. Another good
stamp-controlled option is Stampplot lite, and pro, from
http://www.selmaware.com/
>
>and, then the software. how to display it in pretty pictures and
>graphs. I have been coorsponding with Dave at
>http://www.rhombusinc.com/microgui.html
>
>nice stuff for PC screen displays, but ultimatly, I also need to get
>up to around 40 points. : )
>
>anyone have any ides how to display 40 temperaturs on a PC screen in
>a GUI format ? lines of text are not as fun to look at.
>
>Dave
home from work and tested our fridge as I was worried about its operation. The
unit clearly reported the compresser cycles twice each hour.
Andy
Dave Mucha <davemucha@j...> wrote:
--- In basicstamps@yahoogroups.com, andy shor wrote:
> I would suggest you try looking at the following:
> www.onsetcomputer.com/
I got one of their loggers for temperature and for a test, I stuck it
in the fridge.
it took about 45 minutes to clear 80% of the error and was still
ramping towards temperature at an hour.
A half decent sensor should be able to monitor the compressor on
cycles as temperature dips, this never even made it to the actual
refriderator temperature.
it worked neat at room temperature though.
I'll give them another look.
Dave
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