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Water Level Alarm

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Water Level Alarm circuit diagram
More explanation about water level circuit, please go to this page.

Description:
This circuit will trigger with any fluid with a resistance under 900K between the maximum separation distance of the probes. Let me explain further. The circuit uses a 4050B CMOS hex buffer working on a 5 volt supply.
Make Your Own Printed Circuit Boards
Make a PCB in very easy steps..! Create your PCB design using PCB designer software like Eagle, print out your design on photo paper or glossy paper with laserjet printer. Stick the printed design on the PCB (copper side) and then heat it using hot iron plate. The ink will stick on the PCB and it will be ready for etching process.
Watch this video detailed steps:


Note: If you don't have laserjet printer, then you can print the design on standard paper. Copy the printed design at Copy Service around your location (with glossy paper).

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1 comments so far

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Balas
Conrad delete December 23, 2009 at 9:41 AM

Hi,I'm interested about your circuit.I just want to ask that can I disregard ng switch and directly tap the output of the hex buffer to the input of CMOS 4011B IC?

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