hi i made water level controller ckt using 89c51 but it is not working and there is no sign of relay working when the water level decrease wheather it is under ground tank or above tank all led at output indicate indicates except pin no 4(pi.3)does not indicating does it require 3 different power supply and there is voltage at o/p pin no 36(p2.4) can i get solution or any other ckt which works perfectly

water level indicator and microcontroller

To get full information or details of water level controller please have a look on the pages

http://studentbank.in/report-water-level...advantages

http://studentbank.in/report-automatic-w...er-circuit

http://studentbank.in/report-water-level...e=threaded

http://studentbank.in/report-simple-auto...controller

if you again feel trouble on water level controller please reply in that page and ask specific fields in water level controller