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Sensors / Detectors: Humidity
Detectors
Sensors / Detectors -- Main Page
Last Updated on:
Wednesday, April 18, 2012 07:26 AM |
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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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. However, the same can be procured
from....(added 10/05) |
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Environmental Compensation on the AD7142 - AN-829 Analog Devices Application
Notes....[App Note] |
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Low-cost relative humidity transmitter uses single logic IC - 8-Nov-01 Issue
of EDN The low-cost percentage-relative-humidity radio transmitter in Figure 1
operates in a cold-storage warehouse for vegetable storage at temperatures of 1 to
5°C. It is generally difficult to collect such data from a low-temperature area with
high humidity and low illumination. The transmitter design is simple It uses a
readily available, capacitor-type percentage-relative-humidity se.... [Design Idea by
Shyam Tiwari, Sensors Technology Ltd, Gwalior, India] |
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Measure humidity and temperature on one TTL line - 30-Aug-01 Issue of EDN
By combining the responses of an Analog Devices (www.analog.com] AD590 temperature
sensor and a Humirel (www.humirel.com] HS1101 humidity sensor, you can generate a
single TTL-level signal containing information from both sensors (Figure 1].
This design uses a 74HC123 monostable multivibrator, IC1, to form a free-running
oscillator.... [Design Idea by Shyam Tiwari, Sensors Technology Pvt Ltd, Gwalior,
India] |
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Remote humidity sensor needs no battery - 4-Apr-02 Issue of EDN Using
ac-line power sources and batteries for remote humidity sensors is undesirable because
these sources can be troublesome if you mount them in inaccessible points, such as
smokestacks, cold-storage chambers, or darkrooms, where maintenance is difficult and
inconvenient. Figure 1 shows a simple way to remove the power source from the
humidity-sensor circuit.... [Design Idea by Shyam Tiwari, Sensors Technology Private
Ltd, Gwalior, India] |
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Signal Conditioning Precisely indicates Humidity - 02/02/98 EDN-Design
Ideas....The circuit in Figure 1 translates the level of humidity from0 to 100% into a
stable, respective dc signal of0 to 100 mV. The heart of the circuit is IC1, the
IH3602-C relative-humidity sensor (Microswitch/HyCal Sensing Products, Freeport, IL].
This device operates on 5V at 200 mA and provides a dc output of0.8 to 4.0V....
[Design Idea by William Whitehead, Lafayette, CO] |
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Tiny Dew Sensor - .... |
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Transmitter senses triple relative-humidity figures - 26-Sep-02 Issue of EDN
The circuit in Figure 1 is a triple, relative-humidity sensor and radio transmitter.
Sensors 1 and 2 form two gated oscillators with natural frequencies of 10 and 5 kHz,
respectively, at relative humidity of 50%. The gated oscillators use variable
resistances R2 and R3, respectively. Together, these two oscillators generate FSK-modulated
outputs at output of IC1B, Pin 6.... [Design Idea by Shyam Tiwari, Sensors Technology
Ltd, Gwalior, India] |
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Wireless Temperature & Humidity Sensor with USB - this project is based on
obdev's RemoteSensor example and their firmware-only USB implementation; the main
change is the replacement of the analog sensors with a Sensirion SHT11 digital
temperature and humidity sensor…(added 07/07/07) |
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Sensors
/ Detectors: Humidity Detectors
Sensors / Detectors -- Main Page |
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