This is a water sensor /rain alarm circuit diagram; it can be used on motorcycle, car or other device that we want to protect from water, rain.
This is a simple water sensor/rain alarm circuit that makes an alarm when water/rain falls on its sensor. This circuit is based on NE555/LM555 IC and two transistors (Q1&Q2). For transistor Q1- BC547 or BC107 and for Q2- 2N825,BC548 or BC168 can be used in the circuit. This rain detector circuit can be supplied from voltage source of +9V-12V DC. The resistor 470K ohm is a POT/Variable resistor; it is used to adjust the sensitivity of water/rain sensor. Use a 8 ohm,0.5w-1W speaker to hearing better alarm. Less than 8 ohm speaker could be harmful for the IC 555.
This is a simple water sensor/rain alarm circuit that makes an alarm when water/rain falls on its sensor. This circuit is based on NE555/LM555 IC and two transistors (Q1&Q2). For transistor Q1- BC547 or BC107 and for Q2- 2N825,BC548 or BC168 can be used in the circuit. This rain detector circuit can be supplied from voltage source of +9V-12V DC. The resistor 470K ohm is a POT/Variable resistor; it is used to adjust the sensitivity of water/rain sensor. Use a 8 ohm,0.5w-1W speaker to hearing better alarm. Less than 8 ohm speaker could be harmful for the IC 555.
Circuit Diagram of Water Sensor
Fig-1: Water Sensor/Rain alarm circuit diagram |
Water sensor PCB layout:
Fig-2: PCB layout of water sensor |
Can a relay be used in place of the speaker and, if so, what voltage?
ReplyDeleteI had trouble finding a 0.01uF polarized capacitor so tried replacing it with a non-porarized capacitor. Dunno if that's the problem, but, so far, it hasn't worked.
Of course you can but with a required interface for relay.
ReplyDeletealso there is not a big problem with non-polarized capacitor(0.01uF), you can use it. all the best...
Nice Circuit.....
ReplyDeleteThanks buddy......
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