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Overhead Tank Water Level Indicator with Buzzer Alarm – a simple circuit to monitor water level using conductive probes and transistor switches.
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01
Used three NPN transistors (2N2222) for level detection
02
Implemented three separate LED indicators for low, medium, and high levels
03
Added an active buzzer activated when the high-level probe conducts
Domestic overhead tank monitoring, industrial process level indication, school/college electronics projects.