Description Voltage: 5V Power indicator:Output signal LED indicator. TTL-level output TTL output valid signal is low. Driving capacity of around 100mA can directly drive relays buzzer small fan and so on. Sensitivity can be adjusted via a potentiometer. LED lights up when there is no rain output is high raindrops up ground level output LED lights. Raindrops and control panels are separate easy to line leads. Large raindrops board more conducive detected rain. Board with positioning holes to facilitate installation Dashboard board size: 3 x 1.6mm Large area raindrop detection plate 5.4 x 4.0mm Use When connected to a 5V supply power lights no water droplets on-board sensors DO output is high switch lights off drop a drop of water DO output is low the switch indicator light. Brush above water droplets has returned to output high state. AO analog output can be connected to the microcontroller AD port to detect drops in the above rainfall size. DO TTL digital outputs can also be connected to the microcontroller to detect whether there is rain.