Rain Alarm Kit with LED - Solderless

This kit is a rain detector circuit.  When water makes contact with the conductive strips on the PCB, this will set off an oscillator of the transistors and turn ON the speaker and LED. After you wiped off the water on the conductive strip’s surface, the Speaker and LED are turned OFF.

Technical Specification

• Power Supply : 9VDC
• Current Consumption : 28mA.
• PCB Dimensions : 2 x 1.5 in.