Sunday, August 26, 2012

ULN2004 water level indicator circuit

This ULN2004 electronic project circuit diagram design is a very simple water level indicator circuit project . This ULN2004 water level indicator circuit is very simple and require few external electronic parts .
ULN2004 is a high voltage, high current darlington arrays that contain seven open collector darlington pairs with common emitters . Each channel rated at 500mA and can withstand peak currents of 600mA.
As the water level rise in the tank , it comes in contact with probes P1 through P7 and thereby makes pins 7 trough 1 high sequentially . The corresponding output pins 10 trough 16 go low one after other and LED1 through LED7 will light up . When water comes in contact with the last probe P7 , the buzzer connected to the last pin 16 will sound .
This electronic circuit project must be powered from a fixed output DC voltage that will provide an output voltage between 9 and 12 volts .



ULN2004 water level indicator circuit design electronic project

Source: http://www.hqew.net/circuit-diagram/ULN2004-water-level-indicator-circuit_6156.html

1 comment:

  1. Awesome post, Electronics is the technology; it is used for electronic components, integrated circuits, and electrical systems. Thanks for sharing this info.
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