Career point university

By Aditya Sharma

c.S branchk11828

LED WATER LEVEL INDICATOR WITH ALARM

Introduction :A water level indicator is used to show the

level of water in an over head tank, this keep the user informed about the water level at all the time and avoids the situation of water running out when it is most needed. Indicator circuit also has alarm feature. It not indicate amounts of water present in overhead tank but also gives an alarm when the tank is full.

WHY WE NEED IT ?OVER FLOW PROBLEMS .TO PREVENT WASTAGE OF ENERGY .To PREVANT WASTAGE OF WATER .ATTENTIONOBSERVATION.

CIRCUIT COMPONENTSPCB BOARD { 1 PCS }L.E.D OF DIFFERENT COLOR { 3 PCS }RESISTENCE ( 220 ohm ) {6 pcs }TRANSISTOR (BC548 NPN) {4 PCS }BUZZER {1 PCS }BATTERY ( 9 V ) {1 PSC }CONNECTING WIRE BETTERY CAP

CIRCUIT DIAGRAM

HOW IT WORKS ?When water in the tank touches the probe A

& both a small current flows from A to B through water and to the base of transistor T1 via a 220 Ohm resistor . As a result the transistor conducts causing the led 1 glow .

When water touches sensor c ,led2 glow and indicates that the tank is half filled. Finally when the water touches sensor D led 3 glows and indicates the tank is completely filled .

When touches touches the buzzer wire buzzer will start and indicate that water is over flowing .

WATER LEVEL INDICATOR CIRCUIT FEATURES :EASY installation .Low maintenance .Compact elegant design .Save electricity and water .Fully automatic , saves man power .Consume very little energy , ideal for

continuous operation.Show clear indication of water levels .

APPLICATION :IT is as use as leveller in storage tank ,

boilers to indicate level of water inside .Easily indicate when water level is full in tank

with beep sound .It can be used to measure any liquid which

are electricity sensitive .No extra sensor need . wire can be used as

sensor .Low cost . To save water .

PROJECT COST :PCB BOARD 40 L.E.D 12BUZZER 30RESISTANCE 10CONNECTING WIRE 20BATTERY & CAP 60SOLDING MECHINE 270*SOLDING WIRE 50*TOTAL COST = 492