simple water level buzzer circuit


Posted on Feb 5, 2014

Here is a simple water level buzzer circuit which can be used to detect or sense the level of water in tank, pool, washing machines etc. When the two probes shown in this water level indicator circuit will detect water the buzzer will start producing sound. The circuit is very simple and low cost using only few parts like Buzzer, Transistor, 300K


simple water level buzzer circuit
Click here to download the full size of the above Circuit.

variable resistor and a 9V battery or power supply. The circuit is using BC547B NPN transistor but you can use any other general purpose transistor in the place of this transistor like 2N2222 or 2N3904. Working of this water level sensor is simple; the transistor used in the circuit is working as a switch. When the two probes detect water the transistor becomes switched on and as a result the voltage start passing through the transistor, which will activate the buzzer.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    60W Bass Amplifier and Preamp
    AVR Programmer (AT90S2313)
    Pseudorandom-sequencer
    Low-Battery Indicator
    Combined Light-/Dark-Activated Switch Circuit
    octopus curve tracer
    Fluid level control schematic diagrams
    Simple Ring Modulator
    Circuit of power fm transmitter transistor 2n2218 audio wireless 1KM
    2-5-cell lithium battery charger circuit
    A read-only phase sequence indicator circuit
    Hydraulic oil Automotive LED Alarm SL322C schematic
    Auxiliary power supply circuit using variable speed



    Top