- published: 11 May 2015
- views: 19156
A rain sensor or rain switch is a switching device activated by rainfall. There are two main applications for rain sensors. The first is a water conservation device connected to an automatic irrigation system that causes the system to shut down in the event of rainfall. The second is a device used to protect the interior of an automobile from rain and to support the automatic mode of windscreen wipers. An additional application in professional satellite communications antennas is to trigger a rain blower on the aperture of the antenna feed, to remove water droplets from the mylar cover that keeps pressurized and dry air inside the wave-guides.
Rain sensors for irrigation systems are available in both wireless and hard-wired versions, most employing hygroscopic disks that swell in the presence of rain and shrink back down again as they dry out — an electrical switch is in turn depressed or released by the hygroscopic disk stack, and the rate of drying is typically adjusted by controlling the ventilation reaching the stack. However, some electrical type sensors are also marketed that use tipping bucket or conductance type probes to measure rainfall. Wireless and wired versions both use similar mechanisms to temporarily suspend watering by the irrigation controller — specifically they are connected to the irrigation controller's sensor terminals, or are installed in series with the solenoid valve common circuit such that they prevent the opening of any valves when rain has been sensed.
Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then precipitated—that is, become heavy enough to fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides suitable conditions for many types of ecosystems, as well as water for hydroelectric power plants and crop irrigation.
The major cause of rain production is moisture moving along three-dimensional zones of temperature and moisture contrasts known as weather fronts. If enough moisture and upward motion is present, precipitation falls from convective clouds (those with strong upward vertical motion) such as cumulonimbus (thunder clouds) which can organize into narrow rainbands. In mountainous areas, heavy precipitation is possible where upslope flow is maximized within windward sides of the terrain at elevation which forces moist air to condense and fall out as rainfall along the sides of mountains. On the leeward side of mountains, desert climates can exist due to the dry air caused by downslope flow which causes heating and drying of the air mass. The movement of the monsoon trough, or intertropical convergence zone, brings rainy seasons to savannah climes.
Adding a rain sensor to your irrigation controller is an easy and inexpensive way to help conserve water and save money. Hunter Williams from Ewing Irrigation explains the basics. Transcript: An easy way to conserve water and save money is to install a rain sensor on your irrigation controller. Rain sensors are fairly simple, reliable devices that use water absorbent disks that expand when exposed to moisture. This triggers an internal switch that breaks the circuit to the solenoid of the irrigation valve preventing it from operating. This particular sensor has a vent ring that can be adjusted to activate based on how much rain has accumulated. Once the disks have dried out, the circuit is no longer interrupted and the system resumes normal operation. Most wired sensors can be used wi...
By watching this video tutorials you can learn, How to Make a simple Rain Detector with Alarm at home. Very easy to do. Thank you for Watching. Subscribe to our How-to-Raju Channel here: https://www.youtube.com/user/sachinsfanrajkumar Visit our website: http://www.howtoraju.com/
If your controller is showing a message indicating that the sensor is active even thought it has not rained or if the sensor is not shutting down the irrigation when it rains, this video will teach you how to test and troubleshoot your rain sensor.
Get this project kit at http://nevonprojects.com/rain-sensing-automatic-car-wiper-project/ The system uses rain sensor to detect rain and then activates the car wiper motor through a microcontroller based circuit. No need for manual intervention
Arduino Code: void setup() { // initialize serial communication at 9600 bits per second: Serial.begin(9600); } void loop() { // read the input on analog pin 0: int sensorValue = analogRead(A0); Serial.println(sensorValue); delay(100); }
The wipers activate at the optimum wiping cycle when the rain sensor detects rain drops on the windshield while the lever is in AUTO.
This is an Automatic window rain sensor. Part List : 1. DC 12V linear actuator 2. DC 12V Relay 2EA(4NO & 4NC) 3. Push Button Switch 3 EA(NO & NC) 4. N-Mosfet(IRF730) & 100kΩ Resistor 5. DIY Rain Sensor 6. DC12V Power Supply
This is a Simple Rain alarm circuit made of 3V battery, Buzzer, Transistor and junk plastics.
Cathie shows you how rain sensors work and how to easily install
Adding a rain sensor to your irrigation controller is an easy and inexpensive way to help conserve water and save money. Hunter Williams from Ewing Irrigation explains the basics. Transcript: An easy way to conserve water and save money is to install a rain sensor on your irrigation controller. Rain sensors are fairly simple, reliable devices that use water absorbent disks that expand when exposed to moisture. This triggers an internal switch that breaks the circuit to the solenoid of the irrigation valve preventing it from operating. This particular sensor has a vent ring that can be adjusted to activate based on how much rain has accumulated. Once the disks have dried out, the circuit is no longer interrupted and the system resumes normal operation. Most wired sensors can be used wi...
By watching this video tutorials you can learn, How to Make a simple Rain Detector with Alarm at home. Very easy to do. Thank you for Watching. Subscribe to our How-to-Raju Channel here: https://www.youtube.com/user/sachinsfanrajkumar Visit our website: http://www.howtoraju.com/
If your controller is showing a message indicating that the sensor is active even thought it has not rained or if the sensor is not shutting down the irrigation when it rains, this video will teach you how to test and troubleshoot your rain sensor.
Get this project kit at http://nevonprojects.com/rain-sensing-automatic-car-wiper-project/ The system uses rain sensor to detect rain and then activates the car wiper motor through a microcontroller based circuit. No need for manual intervention
Arduino Code: void setup() { // initialize serial communication at 9600 bits per second: Serial.begin(9600); } void loop() { // read the input on analog pin 0: int sensorValue = analogRead(A0); Serial.println(sensorValue); delay(100); }
The wipers activate at the optimum wiping cycle when the rain sensor detects rain drops on the windshield while the lever is in AUTO.
This is an Automatic window rain sensor. Part List : 1. DC 12V linear actuator 2. DC 12V Relay 2EA(4NO & 4NC) 3. Push Button Switch 3 EA(NO & NC) 4. N-Mosfet(IRF730) & 100kΩ Resistor 5. DIY Rain Sensor 6. DC12V Power Supply
This is a Simple Rain alarm circuit made of 3V battery, Buzzer, Transistor and junk plastics.
Cathie shows you how rain sensors work and how to easily install
In this video I am troubleshooting a problem with the rain light sensor.
Пробую сам инициализировать датчик интенсивности дождя.... К сожалению пока безрезультатно......(
Oh no! It's raining and the washing (or cat) is still out! It's VERY easy to create a wireless rain sensor that communicates via a 433Mhz (or 315Mhz) wireless link giving you that all important heads-up that the weather has changed. This is the transmitter part of the project (with a very simple breadboard receiver to prove it's all working) that transmits via a 433Mhz link the temperature, the humidity, whether it's raining (and the level of rain falling) and the light level too just for good measure. Oh, and it has a capacitive touch sensor just for good measure. Well, why not? This was originally meant to be an early-warning system to alert us that it was starting to rain and the cat needed to be brought in from his cat run, but has turned into a mini-weather station (that might be ex...
It's funny how a simple project grows and this wireless rain sensor is no exception with its temperature DS18B20 (or perhaps I'll use a combined temp / humidity DHT11 sensor), 433Mhz transmitter, touch pad and more (see next video to see how it all pans out, complete [I hope] with wind speed sensor). So this is all about how to approach a project, initially, with thoughts and project breakdown and just considering some options - all tied together with some proof-of-concept experiments. If nothing else it might make you reflect on how you design your own projects and what steps you go through (either consciously or unconsciously) to get to a satisfying end result. As you'll see next video (or possibly the one after that) even the best laid plans of mice and Ralph don't always follow the ...
Oh no! It's raining and the washing (or cat) is still out! It's VERY easy to create a wireless rain sensor that communicates via a 433Mhz (or 315Mhz) wireless link giving you that all important heads-up that the weather has changed. This is the receiver part of the project (still on breadboard as the custom case has not yet arrived) that receives via a 433Mhz link the temperature, the humidity, whether it's raining (and the level of rain falling) and the light level too just for good measure. Oh, and it has a capacitive touch sensor just for good measure. Well, why not? If you haven't seen video #46 which describes the transmitter part (and before that video #44 which describes the thought processes that went on before building either component) I invite you to watch them now! I'm movin...
John from http://www.growingyourgreens.com/ shows you how easy it is to install the Melnor 4 Zone Wifi Aqua Timer to his drip irrigation system in his garden. In this episode, John takes you through the process of removing his old Melnor 4 Zone Water timer and replace it with the WiFi enabled model that will enable him to monitor the weather in his garden as well as turn off and turn on the watering cycles and change the programming from anywhere in the world when he is connected to the internet on his PC, Laptop, Tablet, or even smartphone. You will see how to easily pair the Wifi Aqua timer to your home network using the Android or IOS app that comes with the timer. You will then learn how to install the timer into your garden and then pair the timer and control unit together. Next,...
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I was asked to machine some covers for light barriers to protect them from rain. Web: http://gtwr.de/ Instagram: https://instagram.com/stefan_gtwr/
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