In this Instructable We are going to see the making of simple Door Bell for our rooms,this project is simplest one even made by beginners very well and very cheap .this project costs $1-$2.

Most of them want privacy on their room, this Door Bell may use to avoid the interruption of others. Simply make this project and fix it on your room, this may help to ask the permission to entering by others.

This Door Bell may also used by main Door Bell of the house.

This Door Bell circuit contains two normal NPN transistors (BC 547) and a musical transistor BT 66 T19L.This circuit consumes 3-4.5V.The amount of volume of the Door Bell is increased by increasing the Voltage level.

Step 1: Gathering Tools & Materials



Resistor - 100R - 1

Capacitor - 220uf/25v - 1

Transistor - BC 547 - 2

BT66T19L 1

Speaker - 4 ohm - 1

Wire ----- required

Battery - AA size - 2

Common PCB ------- required

Push Button Switch - 1

Soap Box

Plastic Bush

Small Tic Tac box

Super Glue

Battery Cap


-Soldering Iron

-Soldering Wire

-Hot Glue Gun

-Wire Cutters

-Insulating Tape

simple circuit!! nice for basic high school projects..
Nice and simple circuit. I was thinking of making it as my project, can you please tell me what is the principle of working of this doorbell?
<p>Nice work.</p>
<p>thank you friend</p>

About This Instructable


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Bio: I am Big loser.continuously 7 times failed in engineering exam.
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