Water Drop Sensor
Description
Water Drop Sensor Module Connected to 5 v power supply power, no water droplets on induction plate, the DO output for the high level, switch lights out, a drop of water drops, the DO output for the low level, switch indicator,brush away the water droplets, return to again, the output high level state.
AO analog output, can be connected to the microcontroller AD mouth drops of rainfall in the above size.
DO TTL digital output can also be connected microcontroller detecting whether it will rain.
- The Water Drop Sensor uses the high quality FR – 04 double material, large area of 5.5 x 4.0 CM, treatment of nickel plating and surface, have fight oxidation, electrical conductivity, and life has more superior performance;
- Potentiometer sensitivity adjustment;
- The output format: Digital switch output (0 and 1) and analog AO voltage output;
- Has a fixed bolt hole, convenient installation;
- The comparator output, signal clean, good waveform, driving ability is strong, for more than 15 mA;
- The LM393, use of wide voltage comparator;
- The working voltage is 3.3V to 5V
Step 1: Getting to Know Your Water Drop Sensor:
Usage:
Water Drop Sensors are used in the detection of water beyond what a humidity sensor can detect.
How it works:
The Water Drop Sensor detects water that completes the circuits on its sensor boards’ printed leads. The sensor board acts as a variable resistor that will change from 100k ohms when wet to 2M ohms when dry. In short, the wetter the board the more current that will be conducted.
Pins:
A0………. Analog output
D0……… Digital output
GND….. Ground
VCC…… Positive voltage (input: 5v for analog 3.3v for Digital.)
Loop Pins:
+ ………. Sensor board hookup A
– ………. Sensor board hookup B
Dimensions:
2.17 in x 1.57 in x 0.31 in (5.5 cm x 4.0 cm x 0.8 cm)
Weight:
0.28 oz (8 g)
Step 2: Testing and Troubleshooting:
Testing:
To test the Water Drop Sensor and ensure that it is working correctly connect the VCC to a 5v power source and GND. Try placing a few droplets of water on the Rain sensor detection board and the D0-LED should light up.
Troubleshooting:
If the D0-LED does not light up check the following:
- Is the module hooked up properly?
- Sometimes salinity is an issue with these units, this one worked fine with filtered, bottled water, but in some instances you may have to add a bit of salt to increase the waters conduction.
- This might be a bit more tricky, but for some reason two different models by two different manufacturers have had defects in their soldering skills. Make sure all of the little SMD’s and connectors have been soldered on properly. IE – are solder joints actually soldered?
- If none of the previous makes the D0-LED light up, your sensor may be defective.
Step 3: Wiring to an Arduino:
To wire the Rain Sensor to the Arduino for analog, simply connect the following as shown:
Water Drop Sensor …………….. Arduino
VCC…………………………. 5v
GND………………………… GND
A0……………………………. Analog in 0
Water Drop Sensor ……………. Sensor Board
+……………………………… +
-………………………………. –
Step 4: Arduino Sketch Example:
The following code maps and reads the analog values given by the Water Drop Sensor (0-1024). The Water Drop Sensor will have the following reaction with this code:
- If the Sensor Board is completely soaked; “case 0″ will be activated and ” Flood ” will be sent to the serial monitor.
- If the Sensor Board has water droplets on it; “case 1″ will be activated and ” Rain Warning ” will be sent to the serial monitor.
- If the Sensor Board is dry; “case 2″ will be activated and ” Not Raining ” will be sent to the serial monitor.
* The output in “case 2”, “Not Raining” is just for this demonstration. When used this code in production It was omitted the output for this case and just had the alert for “Rain Warning” and “Flood”.
* To view the output, point a serial monitor such as Putty at your Arduino.
* This code is constantly updating in order to provide a real time feedback of the Rain Sensor.
For More Info Click Here.
Visit Moon Electronics BD.
Reviews
There are no reviews yet.