Description: If you need to purchase multiple items please click on the link below 3Pcs ID 20115675Pcs ID 201156810Pcs ID 201156920Pcs ID 2011565Description 1 The item is for robot kit raindrops rain sensor monitoring can be used for a variety of weather conditions and converted into the number of the reference signal and the AO output 2 The sensor uses the FR 04 high quality double sided materials King Size 5 0 4 0CM and with the surface of the nickel plating treatment against oxidative conductivity superior performance and longevity 3 The output in the form digital switching outputs 0 and 1 and analog AO voltage output 4 TTL level output TTL output valid signal is low Driving capability 100MA so can directly drive relays buzzer a small fan and so on 5 Sensitivity can be adjusted via potentiometer6 LED lights up when there is no rain output is high raindrop up the output ground level LED light Specification Small board PCB size 3 2cm x 1 4cmOperating voltage 3 3V 5VVoltage 5VFeatures 1 Distribution bit to adjust sensitivity2 A fixed bolt hole for easy installation3 Power indicator the output signal LED indicator4 The comparator output the signal is clean waveform driving ability over 15mA5 Wide voltage LM393 comparator6 A large area of rain board more conducive to detect rain7 Board with positioning holes to facilitate installation8 Raindrops and control panels are separate easy to wire leadsHow to use 1 Connected to 5V power supply