Liquid indicator

Hello everyone, I want to share a little scheme of the water level indicator.



I recently reworked my heating and ran into a little problem, my expansion tank had to be carried to the attic, and I didn’t want to climb at all in the winter to watch, it was my thought to assemble a small and simple scheme.





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For assembly, it took a little, 4 transistors, 5 resistors and 4 LEDs, all values ​​are indicated in the diagram. The scheme is drawn with one indication, but you can multiply as much as you need.







I think the prince of this schema is clear. This is how I got a printed circuit board, I apologize for the quality.







I plan to install the same scheme in the summer shower tank, and sometimes you will get to bathe and the water will end as luck would have it. I hope someone will come in handy this device.



Good luck, thank you all and see you soon.