Breadboard Projects For Beginners: The Musical Bell (DIY)

Detailed, written instructions at: www.instructabl...
(Step 1)
Breadboard Layout: cdn.instructabl...
Schematic: cdn.instructabl...
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Description: This is simple project that can be made easily in five minutes. It is a musical bell that produces a melodious sound just like doorbells. It uses the um66 ic popularly known as the melody ic which has a built in oscillator and an amplifier which can directly drive a buzzer but needs an external circuit to drive a speaker. The supply voltage if the ic is 1.5 - 4.5v so cannot be powered by a 9v battery.
Instructions: Connect everything to the breadboard according to the layout given above. Refer to the images above for the pin configurations of the transistor as well as the ic. Connect a battery holder with 2 AA or AAA batteries to the power rails of the breadboard. Do not connect a 9v battery as it would burn the ic. On switching it on, a musical sound will be heard.
Difficulty: Easy
Parts List:
• 1x UM66 ic
• 1x bc547 or 2n2222 or 2n3904 transistor
• 1x 1K resistor
• 1x 8 ohm speaker OR Buzzer
• 2x AA or AAA batteries OR 3V coin cell
• 1x Battery holder
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Thanks for watching!

[@srigirivasramakrishnan96]

I tried it and succeeded. Instead of speakers i used laptop speakers and sound is good. Thanks for a really educating and wonderful project.

[@SoulMarauder59]

UM66 is hard to buy in the city, you can buy it only on ebay :D

[@srigirivasramakrishnan96]

Yes. UM 66 is difficult to get. I luckily got it from one shop after asking at several shops.

[@hectic_student]

Is it okay to instead use a UM66T IC and a 2N2222 transistor???

[@vicjohannnino9114]

Where did you make your schematic circuit? What app can I simulate it? thank you

[@fatimamansoor3805]

What ic do we use when we don't have um66 on multisim?

[@rutabaamjad9013]

Hi I'm going to make my first ever electronics project and for this I have decided this one as I found it really easy. If I need any help where should I contact you.? Please do reply. Thanks.

[@revoxsvko]

you can contact with me :)

[@arinparab1]

me too

[@secretcommenter5720]

I have a compeny

[@kellydeguzman9665]

hello i cant find the UM 66 in frirzing ? help me plss:

[@prabalsaha]

what type of buzzer u have used?
is it a piezo buzzer?

[@SaiyamAgrawal]

Yes

[@ElectroGuruji]

You can use a 3ohm speaker for better audio quality.

[@aimandanialshamsulbahri5175]

I like this music

[@prabalsaha]

This ckt is not working..
pls help me

[@secretcommenter5720]

Is it fake or not

[@SaiyamAgrawal]

It's not fake obviously!

[@techkistahn9530]

He is making us mad the buzz is of a car

[@SaiyamAgrawal]

Sorry what do you mean exactly? You can clearly see the project working here.

[@samarthawate2442]

Yamuna Suryawanshi Why are you making us mad