Rain Alarm Circuit Diagram. Same circuit can also be used as water level indicator or as a tank overflow indicator. The two transistors are wired as a switch which goes on when the base of q1 is shorted to the positive of the supply by the rainwater falling on the sensor.
Circuit diagram and working explanation. The circuit diagram from the rain alarm project is shown in the below image. Here 555 timer ic has been configured in a stable mode so that buzzer can produce periodically on and off sound.
Circuit diagram of rain alarm.
Rain alarm circuit diagram. Circuit diagram of rain alarm. Here is a simple rain alarm circuit that produces an audible alarm when ever rain falls the rain detector circuit is based on two transistors q1 q2 and a ne555ic ic1. Circuit diagram and working explanation.
