CONTENTS

1)INTRODUCTION

2)CIRCUIT DIAGRAM

3)HOW IT WORKS

4)COMPONENETS DESCRIPTION.

A. IC 5iphon scam TIMER

N. BC 547 TRANSISTOR

C. RESISTER

Deb. CAPACITOR

E. PRESET

F. BUZZER

G. PCB

5)SCOPE

1) LAUNCH:

Generally when we are water removal liquids just like water or may be some other liquid is usually we need a runner to see perhaps the tank full or not really or we all will create a overflow water pipe to know which the tank can be fill or perhaps not in case of water container and we get confirmed through the water coming from overflow tube that the continues to be filled. here is lots of wastage of water and still we really need a human to get a lookВ over it and so in order to avoid this and also to save wastage of normal water or any different liquid that may be being stuffed. Here is a straightforward circuit to get liquid level alarm this circuit simply tells us if the tank is full with a beep sound. It really is built about two BC547 transistors (T1 and T2) and two timer 5iphon ICs(IC1 and IC2). The two IC1 and IC2 happen to be wired in a stable multiple vibrator setting. Timer IC1 produces low frequency, whilst timer IC2 produces high frequency. As a result, a beeping develop is made when the liquid tank contains large amount. Initially, if the tank can be empty, receptor T1 will not conduct. Therefore, transistor T2 conducts and pin 5 of IC1 is low. This low volts disables IC1 and it will not oscillate. The lower output of IC1 hinders IC2 and it does not oscillate. As a result, simply no sound is definitely heard from the speaker. When the fish tank gets chock-full, transistor T1 conducts. Therefore, transistor T2 is shut down and pin number 4 of IC1 turns into high. This high voltage enablesIC1 and it oscillates to produce low frequencies at pin 3. This kind of low-frequency outcome enables IC2and it also oscillates to produce highs. As a result, audio is created from the loudspeaker. Using pre-programmed VR1 we can control the quantity of the audio from the audio. The circuit can be run from a 9V electric battery or by mains by using a 9V power adaptor. This kind of circuit canВ be easily designed and it is easy to Assemble the circuit on a general purpose PCB and we may enclose it in a appropriate cabinet. The circuit is as shown below. Circuit of water level indicator

2) SIGNAL DIAGARM:

3) How functions:

The routine contains

My spouse and i. Bc547 transistors

II. Ic 555 termes conseilles

III. Resistors

IV. Capacitors

V. Speaker/Buzzer/alarm

VI. 9v power supply(battery/ 9v adaptor)

VII. Predetermined

VIII. PCB

Want install two water-level probes using metallic strips such that one details the bottom in the tank and the other splashes the maximum level of the water inside the tank. Connect the messfuhler and the outlet using a adaptable wire as shown in above circuit diagram. once tank is definitely empty or until the the liquid touches the probe present at optimum level the transistor T1 doesn't conducts and then end result is excessive at extractor of receptor T1, this kind of drives the transistor T2 and receptor T2is in on state, and the result at extractor of transistor will be low and as it is connected toВ pin4(reset pin) this disables ic1(555timer) and result at pin3 which is also low and as it really is connected to pin4 of ic2(555timer) and the outcome is also low at pin3and it does not produce any appear. When the drinking water or the liquid level touches the second probe which is in maximum liquefied level, the transistor T1 conducts and then output can be low at collector of transistor T1, this hard disks the receptor T2 in to cutoff and transistor T2 is in off state, and the output in collector ofВ transistor will be substantial and as it truly is connected to pin4(reset pin) this permits ic1(555timer) and output in pin3 and this is high so that as it is connected to pin4 of ic2(555timer) plus the output isВ produced at pin3and it produces sound. through hearing appear we can state that the fish tank is filled with liquid and we could end filling it. Also we require a human to switch on and off theВ pumping of...

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