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The MONTREAL WEATHER
A weather monitor for
builders. As good as my original Taylor drum recorder.
This is the only electronic
graph pressure and outside temperature recorder.
This project is only for experienced home builder.
The narrow trace is the outside temperature graph.
The wide trace is the pressure graph.
USING THE WEATHER RECORDER
- 3 days of recording every 30 minutes.
- Measurement Range: Barometer; 95.0 to 105.0 kPa, resolution 1mb.
Thermometer; -35 to +35 C.
- Mesurement and graph scales of 1 mb and 0.5 C resolution.
- Automatic switching between the 2
temperature scales; -35 < +15C for winter and -15 <
+35C for summer.
- Day of the week, time, present temperature and pressure display
on the first line.
- ENGLISH MARKING for day of the week and time header
- Display Optrex 160 X 128 pixels, LED backlighted. DK part
Recorder's Parts list.
- A DECREASE IN BAROMETRIC PRESSURE ANNONCES BAD WEATHER,
RAIN, WIND,STORM, HEAT.
- A RISE OF BAROMETRIC PRESSURE ANNOUNCES NICER, DRY, COLDER
1- A slow, regular and moderate fall in pressure indicates that a low
pressure area is passing
at a good distance. There should not be any
marked change in weather.
2- A sudden decrease, even if it is small, announces a nearby
disturbance; normally meaning
wind, short showers. If large in 5 to 6 hours,
signals a comming storm.
3- A large, slow and maintained decrease announces a long
period of bad weather.
This bad weather will be more pronounced if
the barometer started higher to go lower.
4- A sudden rise of the pressure, when the pressure is about
average or above
average and the weather is nice, always
announces the aproach of a low and the barometer
will soon start to come down.
5- A rapid rise when the pressure is low, annonces a short
period of nice weather;
but, if the rise is large and prolonged, we
can count on a many days of good
6- A sharp change in temperature indicates a change in air mass and
Read a more elaborate text on
The PCB in 300 dpi.
Construction and operation text.
Read it carefully if you intend to construct the recorder.
| Here is the complete schematic
for the barograph.
Here is the viewer/printer
software for the PCBs, and the complete PCB
The above vieweris self
contained software and do not leave traces on your PC.
Here is the source
program and the object code
The PCB and a pre-programmed PIC are
writing to me at firstname.lastname@example.org.
All material on this page is distributed on a
WYSIWYG basis and as such I can't take any responsibility for the use
of this design and its results. However in saying this it must also be
mentioned that every effort has been taken to ensure that it as
error free as possible.
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Many thanks to Al Waller K3TKJ for graciously
hosting my web pages on QSL.NET.