Which is good for comparing small voltage values and giving corresponding output at the signal or output pin. Unlike many it is also built out of LM393 low power Dual-Voltage comparator.The only difference is the sensing area or the plate which is exposed to rain to detect it. The construction of rain drop sensor is very simple and relatable to many other sensors.Analog value is not useful in most of the cases because, as soon as the water falls on the plates, the Digital output will be high, so there is no scope for analog values. The second disadvantage is very selective, as the analog value which is provided in the sensor is not used mainly.Which you should consider if you are using this sensor task in which plate is exposed to moisture and water for a long time. That is the quality of the PCB of the sensing Plate or PCB. The main disadvantage of the sensor is the same as the Soil Moisture Sensor.Secondly, there are mounting holes present on both sensing plate and main PCB which can be used to mount both the PCB on separate places.The sensing area is quite good for small projects and can easily be expanded more, as recommended above. The main advantage of the rain sensor is the sensitivity of the sensor at such a cheap price.Also like soil moisture sensor main PCB, its main PCB also has a center hole through which you can stick or fix it on a separate place from the sensing area.
You can relate it’s schematic and working of rain sensor much to these sensors.
#Raindrop candy Offline
These type of sensor are easily available in the online and offline market at a very cheap price or can be built easily for large scale purpose.
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