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Rain Alarm Project AUGUST 9, 2017 BY — 20 COMMENTS
Contents [hide] 1 Circuit Diagram 2 Components Required 3 Rain Alarm Project Block Diagram 4 Rain Water Sensor 5 Working of the Circuit 6 Rain Alarm Project Circuit Applications: 7 Related Articles
Rain Alarm Project is a simple but very useful project that detects Rain (Rain Water) and automatically triggers an alarm or buzzer. Water is a basic need in every one’s life. Saving water and proper usage of water is very important. Here is an easy project which will give the alarm when there is rain, so that we can make some actions for rain water harvesting and also save the rain water for using it later.
With the help of saving this rain water through rain water harvesting, we can increase the levels of underground water by using underwater recharge technique. Rain water detector will detect the rain and make an alert; rain water detector is used in the irrigation field, home automation, communication, automobiles etc. Here is the simple and reliable circuit of rain water detector which can be constructed at low cost.
I
A
L
S
In this project, we have designed a simple Rain Alarm Circuit, which, upon detecting rain, will
activate a buzzer. Based on the buzzer, we can take necessary actions.
Circuit Diagram The circuit diagram from the Rain Alarm Project is shown in the below image.
Components Required 1 x Small Rain Sensor 1 x 555 Timer IC 1 x BC548 NPN Transistor 2 x 2N2222 NPN Transistor 1 x Bright White LED 1x 1N4007 PN Junction Diode 1 x 220 KΩ Resistor (1/4 Watt) 1 x 330 Ω Resistor (1/4 Watt) 1 x 10 KΩ Resistor (1/4 Watt) 1 x 470 KΩ Resistor (1/4 Watt) 2 x 3.3 KΩ Resistor (1/4 Watt) 1 x 68 KΩ Resistor (1/4 Watt) 1 x 22 µF Capacitor (Polarized) 2 x 100 µF Capacitor (Polarized) 1 x 10nF Ceramic Capacitor (Code – 103) 1 x 100pF Ceramic Capacitor (Code – 101) 1 x Buzzer (or Speaker – 8Ω) Connecting Wires Breadboard 12V Power Supply
Rain Alarm Project Block Diagram The block diagram of the Rain Alarm Project is shown in the following image. The three main components of the project are the Rain Water Sensor, 555 Timer IC and Buzzer.
When the Rain Water Sensor detects the Rain, it sends a signal to the 555 Timer. The 555 Timer IC, which is configured in its Astable Mode, will then activate the Buzzer.
Rain Water Sensor The Rain Water Sensor used in this project is shown in the image below. It is a simple sensor and it is an easy to use tool for detecting rain. It can act as a simple switch, where the switch is normally open and when there is rain, the switch closes.
Even though Rain Water sensor is the main component in the circuit. We need not to go and buy in the market or online. We can do it ourselves just by taking the piece of Bakelite or Mica board and aluminium wire. Bakelite or Mica board should be made completely at and aluminium wire should be pasted on the at board as shown in the gure below. Care should be taken that there should be no spaces between the wire and board. When the rain water sensor is completed, it should get connected to the circuit and voltage should be ed through the wires.
If there is no rain, the resistance between the s will be very high as there will be no conduction between the wires in the sensor. If there is rain, the water drops will fall on the rain sensor, which will form a conductive path between the wires and it also decreases the resistance between the s. As a result, the wires on the sensor board will conduct and trigger the NE555 timer through the transistors circuitry. Once NE555 is triggered, it will make the output pin high and which will make the buzzer to make alarm.
Working of the Circuit We will see the working of the simple Rain Sensor Alarm Circuit Project. When rain falls on the sensor, the Aluminium Wires on the Sensor Board will start conducting and close the path between the supply and base of the transistor Q2. As a result, the Transistor Q2 will turn ON, which will also turn ON the Transistor Q1. This will turn ON the Bright White LED connected to the emitter of the Transistor Q1. When the transistor Q2 is saturated, the capacitor C1 will be shorted and will make the transistor Q3 to be turned ON. C1 will get charged by the resistor R4. When the Transistor Q3 reaches the saturation mode, the Reset Pin of the 555 Timer IC, which is connected to the emitter of Q3, will be made positive. The 555 timer is configured in Astable Mode. As the Reset pin of the 555 Timer IC is given positive voltage, it becomes active and we will get a Pulse signal at the output pin 3 of the 555 Timer IC. This will turn ON the buzzer and the alarm is activated.
If you are using a speaker, Capacitor C4, which is connected in between the Pin 3 of 555 timer and the speaker, will block the DC signal and allows only the variations in the signal which makes the speaker to make sound. The diode D1 will not allow any reverse current from the timer. Because of the resistor R4 and capacitor C1, when the capacitor is completely charged, the transistor Q3 will get in to cut – off mode after sometime. As a result, the Reset pin of the 555 Timer IC will not receive any positive voltage and the speaker will stop making sound. The time for 555 Timer to make speaker sound depends on the values of C1 and R4. When there is no rain, the aluminium wire on the sensor will not conduct as they do not have any conduction path (open circuit). As a result, the sensor cannot trigger the 555 Timer IC and there will be no alarm. Note: Rain senor should be kept in the open place at 30 to 40 degrees from the ground. As a result, rain water will not be present on the sensor for long time. This circuit will automatically switch of the alarm after sometime and LED will glow continuously until the rain stops.
Rain Alarm Project Circuit Applications: 1. In the irrigation, it will detect the rain and immediately alert the farmer. 2. In automobiles, when the rain detector detects the rain it will immediately active the wipers and inform the driver. 3. In communications, it will boost the power of the antenna and increase the signal strength to send or receive the signals. 4. In normal house hold, with the help of rain water detector we can automatically save the rain water. (This can be done only when home automation is done and there is proper equipment to save the rain water. In this, rain water detector will detect the rain and helps to switch ON the equipment which will automatically save rain water for different purposes). 5. This can also be used if there is a chemical rain also. This is very common in industrial areas.
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FILED UNDER: ELECTRONICS, FREE PROJECT CIRCUITS, MINI PROJECTS
Comments Raúl Eduardo Bravo says OCTOBER 28, 2013 AT 12:29 AM
Useful! Reply
Anurag says OCTOBER 31, 2013 AT 7:21 AM
how can we calculate the current from the sensor like what is the resistance of the sensor. Because we need to know the resistance in order to set the bias for transistor. How did you do that, can you tell me? Reply
d anil kumar says OCTOBER 31, 2013 AT 10:35 AM
to know the unknown resistance of a sensor simply keep the two terminals in a multimeter device and keep the device in resistance mode. automatically with in a fraction of seconds you can found the unknown resistance of the sensor you are using in your project……… Reply
d anil kumar says OCTOBER 31, 2013 AT 10:37 AM
you can use digital multimeter to found the unknown resistance of a electronic device….. Reply
Bugx Raja says NOVEMBER 28, 2013 AT 3:58 PM
What should be the Voltage that we need to through the wires? Reply
ponraj says JUNE 28, 2014 AT 6:41 AM
useful Reply
sangeetha says JULY 14, 2014 AT 1:39 PM
THANK YOU…………….. Reply
raj says SEPTEMBER 18, 2014 AT 7:24 AM
Is that the circuit is work?? Because I’m in plan of doing this as my final year project. Please reply me fast as possible. Thank you very much. Reply
Ahmef A. Abod says SEPTEMBER 29, 2014 AT 7:46 PM
hi 1. Where is the power supply? 2. Q1 connected uncorrectly because it’s connected as reverse bias and the LED never work 3. This CCT not work properly. Reply
Geoff says OCTOBER 16, 2014 AT 11:01 AM
Where is the Battery / Power Supply in this circuit? Reply
roshani says FEBRUARY 1, 2016 AT 9:57 AM
usesful!!!!!! i will try…… Reply
patil rohini says FEBRUARY 21, 2016 AT 7:03 AM
use 15v dc adapter for power supply Reply
Mr. Pyus says JULY 17, 2016 AT 11:24 AM
Every thing are defined but voltages not showing how much required ensure it ? Reply
sajjad says SEPTEMBER 24, 2016 AT 8:55 AM
please give what should be the voltage and correct connections Reply
Mounika says JANUARY 3, 2017 AT 4:17 AM
Sir please send me the hr202 humidity sensor background Reply
noor says FEBRUARY 22, 2017 AT 1:26 AM
hi i need the component details plzz help me out Reply
Suvoda susovita says APRIL 14, 2017 AT 10:46 AM
hello vl u plz clarify wer 2 connect the voltage supply Reply
Suvoda susovita says APRIL 14, 2017 AT 10:50 AM
can any one please clarify where to connect the power suppy and…..what should be the range….means perticullarly what should be connected and where… Reply
Anusha says JUNE 20, 2017 AT 5:02 AM
Connect Vcc to the 555 timer vcc and ground pin to C2… Reply
helen says JUNE 17, 2017 AT 7:34 AM
How can we create the rain detector Reply
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HOME » FREE PROJECT CIRCUITS » ELECTRONICS » RAIN ALARM PROJECT
Rain Alarm Project AUGUST 9, 2017 BY — 20 COMMENTS
Contents [hide] 1 Circuit Diagram 2 Components Required 3 Rain Alarm Project Block Diagram 4 Rain Water Sensor 5 Working of the Circuit 6 Rain Alarm Project Circuit Applications: 7 Related Articles
Rain Alarm Project is a simple but very useful project that detects Rain (Rain Water) and automatically triggers an alarm or buzzer. Water is a basic need in every one’s life. Saving water and proper usage of water is very important. Here is an easy project which will give the alarm when there is rain, so that we can make some actions for rain water harvesting and also save the rain water for using it later.
With the help of saving this rain water through rain water harvesting, we can increase the levels of underground water by using underwater recharge technique. Rain water detector will detect the rain and make an alert; rain water detector is used in the irrigation field, home automation, communication, automobiles etc. Here is the simple and reliable circuit of rain water detector which can be constructed at low cost.
I
A
L
S
In this project, we have designed a simple Rain Alarm Circuit, which, upon detecting rain, will
activate a buzzer. Based on the buzzer, we can take necessary actions.
Circuit Diagram The circuit diagram from the Rain Alarm Project is shown in the below image.
Components Required 1 x Small Rain Sensor 1 x 555 Timer IC 1 x BC548 NPN Transistor 2 x 2N2222 NPN Transistor 1 x Bright White LED 1x 1N4007 PN Junction Diode 1 x 220 KΩ Resistor (1/4 Watt) 1 x 330 Ω Resistor (1/4 Watt) 1 x 10 KΩ Resistor (1/4 Watt) 1 x 470 KΩ Resistor (1/4 Watt) 2 x 3.3 KΩ Resistor (1/4 Watt) 1 x 68 KΩ Resistor (1/4 Watt) 1 x 22 µF Capacitor (Polarized) 2 x 100 µF Capacitor (Polarized) 1 x 10nF Ceramic Capacitor (Code – 103) 1 x 100pF Ceramic Capacitor (Code – 101) 1 x Buzzer (or Speaker – 8Ω) Connecting Wires Breadboard 12V Power Supply
Rain Alarm Project Block Diagram The block diagram of the Rain Alarm Project is shown in the following image. The three main components of the project are the Rain Water Sensor, 555 Timer IC and Buzzer.
When the Rain Water Sensor detects the Rain, it sends a signal to the 555 Timer. The 555 Timer IC, which is configured in its Astable Mode, will then activate the Buzzer.
Rain Water Sensor The Rain Water Sensor used in this project is shown in the image below. It is a simple sensor and it is an easy to use tool for detecting rain. It can act as a simple switch, where the switch is normally open and when there is rain, the switch closes.
Even though Rain Water sensor is the main component in the circuit. We need not to go and buy in the market or online. We can do it ourselves just by taking the piece of Bakelite or Mica board and aluminium wire. Bakelite or Mica board should be made completely at and aluminium wire should be pasted on the at board as shown in the gure below. Care should be taken that there should be no spaces between the wire and board. When the rain water sensor is completed, it should get connected to the circuit and voltage should be ed through the wires.
If there is no rain, the resistance between the s will be very high as there will be no conduction between the wires in the sensor. If there is rain, the water drops will fall on the rain sensor, which will form a conductive path between the wires and it also decreases the resistance between the s. As a result, the wires on the sensor board will conduct and trigger the NE555 timer through the transistors circuitry. Once NE555 is triggered, it will make the output pin high and which will make the buzzer to make alarm.
Working of the Circuit We will see the working of the simple Rain Sensor Alarm Circuit Project. When rain falls on the sensor, the Aluminium Wires on the Sensor Board will start conducting and close the path between the supply and base of the transistor Q2. As a result, the Transistor Q2 will turn ON, which will also turn ON the Transistor Q1. This will turn ON the Bright White LED connected to the emitter of the Transistor Q1. When the transistor Q2 is saturated, the capacitor C1 will be shorted and will make the transistor Q3 to be turned ON. C1 will get charged by the resistor R4. When the Transistor Q3 reaches the saturation mode, the Reset Pin of the 555 Timer IC, which is connected to the emitter of Q3, will be made positive. The 555 timer is configured in Astable Mode. As the Reset pin of the 555 Timer IC is given positive voltage, it becomes active and we will get a Pulse signal at the output pin 3 of the 555 Timer IC. This will turn ON the buzzer and the alarm is activated.
If you are using a speaker, Capacitor C4, which is connected in between the Pin 3 of 555 timer and the speaker, will block the DC signal and allows only the variations in the signal which makes the speaker to make sound. The diode D1 will not allow any reverse current from the timer. Because of the resistor R4 and capacitor C1, when the capacitor is completely charged, the transistor Q3 will get in to cut – off mode after sometime. As a result, the Reset pin of the 555 Timer IC will not receive any positive voltage and the speaker will stop making sound. The time for 555 Timer to make speaker sound depends on the values of C1 and R4. When there is no rain, the aluminium wire on the sensor will not conduct as they do not have any conduction path (open circuit). As a result, the sensor cannot trigger the 555 Timer IC and there will be no alarm. Note: Rain senor should be kept in the open place at 30 to 40 degrees from the ground. As a result, rain water will not be present on the sensor for long time. This circuit will automatically switch of the alarm after sometime and LED will glow continuously until the rain stops.
Rain Alarm Project Circuit Applications: 1. In the irrigation, it will detect the rain and immediately alert the farmer. 2. In automobiles, when the rain detector detects the rain it will immediately active the wipers and inform the driver. 3. In communications, it will boost the power of the antenna and increase the signal strength to send or receive the signals. 4. In normal house hold, with the help of rain water detector we can automatically save the rain water. (This can be done only when home automation is done and there is proper equipment to save the rain water. In this, rain water detector will detect the rain and helps to switch ON the equipment which will automatically save rain water for different purposes). 5. This can also be used if there is a chemical rain also. This is very common in industrial areas.
Related Articles
Water Level Controller Reverse Parking
Cell Phone Detector
Simple Water Level
using 8051
Circuit
Indicator with Alarm
Sensor Circuit
Microcontroller
(Tested Circuits)
Motion Detector Circuit Simple Fire Alarm Circuits at Low Cost
RF Remote Control
Metal Detector Circuit
Circuit for Home Appliances
FILED UNDER: ELECTRONICS, FREE PROJECT CIRCUITS, MINI PROJECTS
Comments Raúl Eduardo Bravo says OCTOBER 28, 2013 AT 12:29 AM
Useful! Reply
Anurag says OCTOBER 31, 2013 AT 7:21 AM
how can we calculate the current from the sensor like what is the resistance of the sensor. Because we need to know the resistance in order to set the bias for transistor. How did you do that, can you tell me? Reply
d anil kumar says OCTOBER 31, 2013 AT 10:35 AM
to know the unknown resistance of a sensor simply keep the two terminals in a multimeter device and keep the device in resistance mode. automatically with in a fraction of seconds you can found the unknown resistance of the sensor you are using in your project……… Reply
d anil kumar says OCTOBER 31, 2013 AT 10:37 AM
you can use digital multimeter to found the unknown resistance of a electronic device….. Reply
Bugx Raja says NOVEMBER 28, 2013 AT 3:58 PM
What should be the Voltage that we need to through the wires? Reply
ponraj says JUNE 28, 2014 AT 6:41 AM
useful Reply
sangeetha says JULY 14, 2014 AT 1:39 PM
THANK YOU…………….. Reply
raj says SEPTEMBER 18, 2014 AT 7:24 AM
Is that the circuit is work?? Because I’m in plan of doing this as my final year project. Please reply me fast as possible. Thank you very much. Reply
Ahmef A. Abod says SEPTEMBER 29, 2014 AT 7:46 PM
hi 1. Where is the power supply? 2. Q1 connected uncorrectly because it’s connected as reverse bias and the LED never work 3. This CCT not work properly. Reply
Geoff says OCTOBER 16, 2014 AT 11:01 AM
Where is the Battery / Power Supply in this circuit? Reply
roshani says FEBRUARY 1, 2016 AT 9:57 AM
usesful!!!!!! i will try…… Reply
patil rohini says FEBRUARY 21, 2016 AT 7:03 AM
use 15v dc adapter for power supply Reply
Mr. Pyus says JULY 17, 2016 AT 11:24 AM
Every thing are defined but voltages not showing how much required ensure it ? Reply
sajjad says SEPTEMBER 24, 2016 AT 8:55 AM
please give what should be the voltage and correct connections Reply
Mounika says JANUARY 3, 2017 AT 4:17 AM
Sir please send me the hr202 humidity sensor background Reply
noor says FEBRUARY 22, 2017 AT 1:26 AM
hi i need the component details plzz help me out Reply
Suvoda susovita says APRIL 14, 2017 AT 10:46 AM
hello vl u plz clarify wer 2 connect the voltage supply Reply
Suvoda susovita says APRIL 14, 2017 AT 10:50 AM
can any one please clarify where to connect the power suppy and…..what should be the range….means perticullarly what should be connected and where… Reply
Anusha says JUNE 20, 2017 AT 5:02 AM
Connect Vcc to the 555 timer vcc and ground pin to C2… Reply
helen says JUNE 17, 2017 AT 7:34 AM
How can we create the rain detector Reply
Leave a Reply Your email address will not be published. Required fields are marked * Comment
Name *
Email *
Website
reCAPTCHA
Please a ed browser to get a reCAPTCHA challenge. Alternatively if you think you are getting this page in error, please check your internet connection and reload. Why is this happening to me?
POST COMMENT
Search this website …
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Automotive Embedded Systems Embedded Operating Systems Electronic Project Kits Electronic Circuit Design Microcontroller Board Rain Chains Rain Water Tanks How To Make A Rain Barrel Cheap DIY Rain Barrels Downspout Rain Water Diverters Drinking Rain Water Rain Water Collection Barrels Push Button Switches Uninterruptible Power Supply High Voltage Power Supply
PROJECTS BY CATEGORY
Arduino Projects (200+)
Electronics Projects (250+) Mini Project Circuits (160+) Mini Project Ideas (150+) ECE Projects (150+) EEE Projects (150+) 8051 Projects (110+) Raspberry Pi Projects (101+) Electrical Project Ideas (100+) Embedded Projects (100+) Latest Electronics Ideas (100+) Microcontroller Mini Projects (100+) Robotics Projects (100+) VLSI Projects (100+) Solar Projects (100+) IOT Projects (100+) Communication Projects (70+) LED Projects (70+) Power Electronics Projects (60+) RFID Projects (60+) Home Automation Projects (50+) Matlab Projects (50+) EIE Projects (50+) Wireless Projects (50+) LabView Projects (45+) Zigbee Projects (45+) GSM Projects (40+) 555 Timer Circuits (40+) Sensor Projects (40+) ARM Projects (60+) DTMF Projects (30+) PIC Projects (30+) Electrical Mini Projects (25)
GENERAL
Tutorials Symbols Courses Calculator PROJECTS
Electrical Electronics Embedded Power Robotics ARM
IOT PROJECTS
Mini projects Microcontroller Aurdino Solar Free circuits Home Automation TUTORIALS
Capcitors Resitors Filters Diodes Transistors TUTORIALS
Amplifiers IO Devices Thyristors DC Circuits Nummber System FOLLOW US
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