DoorBell circuit using UM 66 IC
Doorbell Circuit
Description
Here is a simple and easy to build doorbell circuit using IC UM 66.The details of UM 66 is given in the older post “Melody Generator using UM 66″. This is a slight modification of that circuit.In the previous circuit you have to keep the switch pressed for making the IC play the full music.Here if once the push button is pressed C1 is charged and the transistor Q2 will keep the IC playing the music till it ends.The time for the IC to play depends on discharging time of C1 which can be set by R1.Set R1 to select your time ,whether full tone or a part in one press.Transistor Q2 drives the speaker.
Doorbell Circuit Diagram with Parts List
Notes
- Do not give more than 4.5 V to UM 66.
- POT R2 is not necessary and can be bye passed .But if included you can set the loudness.
We have many other Tone Generator circuits that you may like take a look:
4. Doorbell Circuit using 555 Timer
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how can i build this circuit on breadboard?please send reply show build circuit on breadboard or pcb.
how can i build this circuit on breadboard? please show circuit on breadboard and on pcb also.
What does the meaning of 3 on 100k & 10k pot. What value should I place in these two pot.
how does R1 vary the time of charging of c1..
is it directly or inversely proportional
I get good help
thank u so much for u r valuble information
-ranji@pnr-
hey
i want its complete description
an any one help me ?????
Hi Kiran see the notes kindly delete R2 and connect speaker to + direct, without pot.
hello!
i saw the circuit it was good but i want to make reverse horn of car.please send me a simple and with loud sound because i am just a beginner of electronic.
thankyou,
from ramya
hi!!!!
i made the circuit but from the 100k pot fire sparks are coming out.please can you tell me whats wrong in the circuit.
thankyou,
from kiran
i want description about music bell circuit diagram can you send the same on my email id
Respected,
i want 36 v input operated, 2-3 minit timer musical pcb digram want with parts list. can u send me on my mail id
nirmal2006us@yahoo.co.in
Hi Maina try for 3481 series ICs HT3820, 4822, AM993-9A etc. any melody generator IC which can work from 2.7 to 5 volt can be used
i cant find um66 in kenya,what equivalent ic would u recomend 4 me
Hi Nishanth you are right Pin no1 common, 2 supply and 3 output.
http://pdfdata.datasheetsite.com/web/24921/UM66T.pdf
This IC is a basic CMOS ROM with built in melody, which is prefixed and cannor be changed.
I need some explanation of the circuit. As far as I know the output of the IC UM66 is from 3rd pin but it is taken from 1st pin. So pls provide some explanation. Pls…
am to get a project for my final year. i need a suggestion of what kind of project i can make am studying a diploma in Telecommunicatiun Engineering can anyone help pliz
HOW DO I WIRE THIS BELL SYSTEM. “A” BELL “AB” BELL “BC”BELL “A” PUSHBUTTON “AB” PUSHBUTTON “BC” PUSHBUTTON ONE MASTER PUSH BUTTON WHEN PRESSED TO RING ALL THREE BELLS.
I can’t find UM66 in Singapore. I’d appreciate your recommendation of an equivalent chip that can simply replace it in the same circuit. Thanks in advance.
I am building a doorbell for deaf people.A device will be tied to the deaf person’s hands…When the doorbell rings the device should vibrate so that the person knows somone is ringing the bell .Could u tell me a solution for this
i feel there must be description over the diagram for better understanding. if it is their i didn’t find.
door bell
this circuit has very low sound…!
\do have any solution
have you adjusted the potentiometer R2??
Good Info , thanks for sharing..!