Specification: Origin: Mainland China Sensor Using FR-04 Double-Sided Material, Area 5.0*4.0cm, And With Nickel-Plated Surface Treatment, With More Performance On Oxidation Resistance, Conductivity, And Life; Comparator Output, Clean Signal, Good Waveform, Drive Ability, More Than 15ma. With Potentiometer To Adjust The Sensitivity; Operating Voltage 3.3V-5V Output Form: Digital Switching Output (0 And 1) And Analog A0 Voltage Output; With Fixed Bolt Holes For Easy Installation Size: 55*40*5mm/2.15*1.56*0.2in Use Wide Voltage LM393 Comparator Product Usage: Robot kit, raindrop, rain sensor, can be used for monitoring various weather conditions and converted to digital signal and AO output. Function Description: Connect the 5V power supply, the power indicator is on, when there is no water drop on the sensor board, DO output is high, the switch indicator is off. When there is a drop of water on the sensing board, DO output is low level, switch indicator light, brush off the water drop on it, and it returns to output high level state. AO analog output, can be connected to the AD port of the microcontroller to detect the size of the rain drops on it. DO TTL digital output can also be connected to the microcontroller to detect whether there is rain. Wiring Mode: 1. VCC: connected to the power supply positive (3-5V) 2. GND:connect the negative power supply 3. D0:TTL switch signal output 4. A0:Analog signal output Shipping List: 1. As shown in the picture of the raindrop sensor board and control board each one 2. 20cm DuPont line 2, convenient wiring Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. 1*Raindrop Sensor Board+Control Board 2*20cm Dupont Cable _x000D_