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1 Wire Barometer - By using a dual voltage supply, instrument
precision and/or instrument range can be improved without adding
significantly to the parts count.… [from Rob Paisley's Model Train web site] |
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1-Wire Barometer (David Bray) - This article describes details for
constructing a 1-Wire Barometer which will work on a Dallas Semiconductor
Corporation 1-Wire network. The reason for this second version is that the
transistor level-changer of the original design was found to be temperature
sensitive....Circuit design added 08/08/08) |
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1-wire barometer (gladstone) - This is a description and the
ongoing story of my project to build a 1-wire barometer based on the
MPX4115A.... |
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1-wire lightning monitor - This article describes the construction
of an experimental lightning monitor for use with the Dallas Semiconductor
1-wire bus. This monitor provides real-time data on lightning activity
by counting the number of lightning strikes in the area. This device
is designed to either....(design added 08/08/08) |
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1-wire weather station - The Dallas Semiconductor 1-Wire Weather Station
(WS-1) was created in 1998 as a demonstration tool of 1-Wire technology. It was
featured in the June 1998 issue of Sensors magazine. The weather station reports wind
speed, direction, and temperature to a PC connected via its RS-232 serial port....(app
note added 08/08/08) |
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1-wire weather station - This article presents a 1-Wire® weather station
that solves many of these problems by transmitting both power and bi-directional data
over a single twisted-wire cable |
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1-Wire Weather Station (Dan Awtrey) - To accurately describe current weather
conditions and predict coming events, meteorologists need reliable data. Much of this
information is collected from weather stations, and forecasters would like to have
more of them. The problem is that conventional meteorological instrument systems are
inefficient and expensive. (design added 08/08/08) |
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741 Based Light Sensor - The circuit as shown act as a light sensor. Under
normal conditions the resistance of the LDR is high, keeping pin 2 low. When light
falls onto the LDR the resistance drops to a couple hundred ohms and triggers pin 2
high which biases the base of Q1 via pin 6 and R4 and in turn activates the relay.….
[Tony van Roon's circuit] |
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An Experimenter's 1-Wire Barometer - This article describes details for
constructing a 1-Wire Barometer which will work on a Dallas Semiconductor Corporation
1-Wire network…(circuit added 08/08) |
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AN-256: Circuitry for Inexpensive Relative Humidity Measurement - National
Semiconductor Application Note (app note added 2/06) |
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AN-829: Environmental Compensation on the AD7142: The Effects of Temperature &
Humidity on Capacitance Sensors - AN-829 Analog Devices Application
Notes....[App Note] |
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Anemometer Circuit - A totally Electronic circuit to measure Air FlowZero to
250 feet per Minute. Thats only 2.84 MPHBut it can be Modified for other Rates
of Air Flow(schematic / circuit added 10/06) |
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Another One-Transistor Cloud Charge Monitor - Here is a simple electrostatic
charge monitor that may be used to detect any slowly changing electric field including
charges swirling around in a thunderstorm or the charge on a moving pocket comb from
across a room. The heart of the circuit....(circuit / schematic added 08/08/08)
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Basic Stamp Based Altimeter - A method of determining altitude is by
use of barometric pressure; however, it is not done without difficulty. The
relationship of pressure vs. altitude is not a linear one, it is actually a fairly
complex one, which army came up with in 1930's. This is
equation for calculating(added 6/06) |
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Cloud Charge Monitor - The Cloud Charge Monitor is an extremely sensitive
device capable of detecting subtle (and not-sosubtle) changes in the accumulated
charge overhead. The device consists of a charge-sensing antenna, a 60 Hz notch
filter, a self-zeroing integrator, a signal limiter, and a leakage zero
adjustment....(electronic circuit added 7/03) |
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Connection Tester - A low resistance ( 0.25 4 ohm) continuity tester for
checking soldered joints and connections (added 09/05) |
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Dew Sensor - Dew (condensed moisture) adversely affects the normal
performance of sensitive electronic devices. A low-cost circuit described here can be
used to switch off any gadget automatically in case of excessive humidity. At the
heart of the circuit is an inexpensive (resistor type) dew sensor element. Although
dew sensor elements are widely used in video cassette players and recorders, these may
not be easily available in local market(added 10/06).... |
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Electronic Barometer - Sooner or later the weather hobbyist wants an
electronic barometer, the main advantage being that it can be read automatically by a
computer, chart recorder, or other data taking system. Most electronic barometers use
some sort of strain gauge transducer to directly convert pressure to voltage and true
weather bureau performance can be difficult to achieve....(design idea added 05/05/05)
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Electronic Barometers - Have you ever noticed how those technical-looking
aneroid barometers in the stores all indicate a different pressure? And when you tap
them gently they assume a new and equally meaningless reading. These are not precision
instruments. And since they tend to stick, they aren't even useful for monitoring the
rapid variations caused by passing storms. A home-made liquid barometer can exhibit
excellent accuracy and repeatability and the response is nearly.... |
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Environmental Compensation on the AD7142 - AN-829 Analog Devices Application
Notes....[App Note] |
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Ethernet Weather Station - Using an add-on card to the already existing avr
ethernet board we build a weather station. That is: A weather station with a build-in
webserver. My original plan was to have sensors for temperature, air pressure and
wind. I started a prototype and it worked very well except for the wind measurement
part. I plan to improve the wind measurement hardware and add it at a later point in
time. ….(electronic schematic added 11/08) |
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Home-Brew electronic altimeter - A while back, I decided I wanted an
altimeter to record how high my rockets were flying. I didn't want to buy one, since
a) they aren't cheap (at least, not the ones which do everything I want them to do),
and b) buying one is far too easy. I considered the CP Technologies kit, which is
based on the Missile Works RRC2,.... |
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Homemade Easter Egg Anemometer - In any wind generator installation, it's
critical to be able to measure wind speed. That gives you a baseline against which to
measure your machine's performance, and anemometers respond much more quickly to
changes in wind speed than do wind generators. Commercial anemometers....(added 2/06)
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