20-08-2012, 10:27 AM
iam rangarao,
sir iwant to liquid level alarm project report full details because i do my mini project. "Plz Help Me" .
LEQUID LEVEL ALARM
ABSTRACT
Most of the time we face the problem of over flowing of tanks either underground or overhead; we forget to close taps which then leads to overflowing thus creating wastage of water. The floating plasticball doesn’t indicate the full position of tank and also creates unnecessary pressure in the pipelines, when motor is used to fill up the tank. This circuit demonstrates an electronic liquid level alarm which intimates us when tank gets full, thereby reducing chances of overflow
It is built around two BC547 transistors (T1 and T2) and two timer 555 ICs (IC1 and IC2). Both IC1 and IC2 are wired in astable multivibrator mode. Timer IC1 produces low frequency, while timer IC2 produces high frequency. As a result, a beeping tone is generated when the liquid tank is full.