interfacing buzzer with 8952

[manomarch]

hey!
how to interface a +5V buzzer with IC 89S52.
someone suggested me to use two bc547 npn transistor.
this is its schematic.




i want to know basically what is this circuit doing?

 

[tpetar]

Interfacing Of a Buzzer Using Microcontroller 89C52/89S52
https://allaboutlearningandearning.blogspot.com/2011/07/interfacing-of-buzzer-using.html

 

[manomarch]

ohk ! that means it can also be controlled with one transistor.
but what if we use two transistor as shown in the circuit.

 

[tpetar]

Its buzzer you dont need two transistors. You can use second transistor if you have different voltages for buzzer and uC or something similar.

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This thread is created in wrong group.

 

[manomarch]

ok may be the circuit i was provided with was wrong or was for other purpose.
anyway i got your point.
thank you

 

[tpetar]

Buzzers are often small current devices, used for some beep signaling, or in some variants can produce songs.

Do you remmember old dialup modems from the time of Indiana Jones :smile:, when dialing buzzers give sounds for dial tone, handshaking,....

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See this link:

PIEZO BUZZER: MELODY – BIRTHDAY SONG
https://tutorial.cytron.com.my/2011/08/10/project-8-–-piezo-buzzer-melody-–-birthday-song/

 

[Tahmid]

Just go through this thread and you'll get all the required information: https://www.edaboard.com/threads/272422/

Diagram from that thread:

 

[learner71]

There are two types of buzzer.
1) Give Supply and get sound
2) Give Pulses and get sound.