Rain Detector


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This circuit uses a sensor made of a small piece of etched PC board and a simple SCR circuit to detect rain and sound a buzzer. The SCR could also be used to activate a relay, turn on a lamp, or send a signal to a security system.

Schematic

This is the schematic of the Rain Detector

Parts

Part
Total Qty.
Description
Substitutions
R111K 1/4 W Resistor
R21680 Ohm 1/4 W Resistor
D111N4001 Silicon Diode
BZ1112V Buzzer
S11SPST Switch
SCR11C106B1 SCR106CY
SENSOR1See Notes
MISC1Board, Wire, Case, PC Board (For Sensor)

Notes

  1. The sensor is a small piece of PC board etched to the pattern showen in the schematic. The traces should be very close to each other, but never touching. A large spiral pattern would also work.
  2. Make sure to use a loud buzzer.

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Comments

anonymous
Rain Detector
Wednesday, April 23, 2008 6:59:48 AM
Is this circuit commercially available?
mosharrof
Rain Detector
Wednesday, April 16, 2008 1:58:50 AM
It is very useful for us.So all of use it.Thanks
Mário Duarte Santos
Rain Detector
Wednesday, April 09, 2008 6:06:22 AM
Please can you explain to me what kind of sensor you refere in project??? I.m very interested in this project, but i dont know that sensor is. Thank you Mário Duarte Santos - Portugal
AVISVP
Rain Detector
Tuesday, April 01, 2008 7:00:36 AM
i would like to build these project of automatic wiper ,pls will u send the necessaray details for the project
yaz
Rain Detector
Wednesday, March 05, 2008 1:26:55 PM
I would like to build this circuit and get it to work, so if you could send me more info about it. thanks
anonymous
Rain Detector
Wednesday, February 27, 2008 8:59:23 AM
are there any project combining between the rain detector and temperature sensor using PIC microcontroller? how much does this project cost?
Patrick
Rain Detector
Wednesday, February 27, 2008 4:38:49 AM
Hi, I'm thinking of making a wireless rain detector, I was going to modify a wireless doorbell system and instead of being activated via a push button to be activated by a moisture sensor. Do you think that the above circuit if viable for my project? Thanks :)
sandy
Rain Detector
Friday, February 08, 2008 2:57:01 AM
can we use this project as moisture detector?
ameen
Rain Detector
Tuesday, January 29, 2008 9:44:01 PM
sir,i wanna to know the function of each component used in this project.actually i have take this project as my assignment,so i hope you can help me.. thanks
anonymous
Rain Detector
Monday, January 21, 2008 3:13:38 AM
so good cicuit.....
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