logging temperature

Grow room design, HID, fluoro, reflectors, ventilation, ballasts and wiring.
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Post by bentech »

i want at least to record highs and lows over a 24 hr period

ideally, id like to log them with time stamps
with the ability to independantly record from numerous sensors

whats my economy build?
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Post by Dick Cheese »

walmart
remote temp gauge, wireless to a readout unit, logs auto 24 hour hi/lo

$9.94 for your cheap ass

http://www.walmart.com/ip/AcuRite-Digit ... r/39174495" onclick="window.open(this.href);return false;

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Post by bentech »

since my present project needs at least 6 locations
im wondering what the step up to a single unit recording numerous remote sensors would be
and if using an old pc to run it wouldnt be the economy choice
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Post by MadMoonMan »

I don't remember what grade it was. 4th? or 5th? we had a male teacher who told us to record the daily temperature and rainfall evry down for a month and turn it in.

At the end of the month the principle canceled that after getting calls from the local weather station from 30 kids asking for the numbers for the last 30 days for a school report.

Didn't take long for that number to get out.
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Post by Dick Cheese »

I could tell you how to make a bank of thermistors, take a PC bread board and wire up charge pumps and eprom delineators outputting to a serial port or usb cable and then how to use a simple excel spread sheet with fox pro to convert into an automatically updated file.....

but I think I would be wasting my time due to it being beyond your ability.

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Post by bentech »

thankfully your not the last word around here...
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Post by MadMoonMan »

Dick Cheese wrote:I could tell you how to make a bank of thermistors, take a PC bread board and wire up charge pumps and eprom delineators outputting to a serial port or usb cable and then how to use a simple excel spread sheet with fox pro to convert into an automatically updated file.....

but I think I would be wasting my time due to it being beyond your ability.

I just do it the hard way. screw all those equations. I'm just a small town CPA JIM! What do I know about piloting a multidemensional vessel?

Just enough to keep my spreadsheets pretty simple as in..

calculating bank interest on a loan.

A few others.

You know how hard it is to isolate those errors in your many formulae?
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Post by MadMoonMan »

Every time its copied and pasted. An energy unit is lost. What does that energy unit loss consist of? How much does it weigh?.. Yes all mass no matter how small it is weights something and in any molecular transactions there is an exchange of a FORM of energy. Which FORM that energy exchange takes depends on those physics laws. How much energy/mass are we talking about?
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Post by Lrus007 »

divide your shadow weight by pi
then take size of arm and how far it moved.
then divide that by 3. then add those two numbers together.
simple math
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Post by MadMoonMan »

It requires an infinite amount of energy to attain complet entrophy.... and then you run into another strange burgerlar called Enthalpy

Intendended to turn your your brains into mush if you dare wade out in the water at the universes end of time.
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