Need suggestion regarding combine two speaker

Thread Starter

Nidhi123

Joined Jul 24, 2018
7
Hello,

i wanted to just know that i want to combine two speaker output into one speaker. Actually i am designing PCB which have one Walkie Talkie speaker and another is FM radio speaker, i want only one speaker for both. can i combine that?
if yes can you please suggest me some switch for that which is also control by Micro controller.

Thanks
 

Thread Starter

Nidhi123

Joined Jul 24, 2018
7
Yes you could combine. You could use power MOSFET (2)
to switch the speaker from one output to the other, high side
switch, if speaker drive is single ended, one side grounded.

https://www.eetimes.com/document.asp?doc_id=1272366

https://www.eetimes.com/document.asp?doc_id=1272367

Regards, Dana.
Hello,
Thanks for your valuable reply. can u please guide me how can i combine that, i have seen that document but i m able to understand it clearly that how may i make connection for that.
please guide me for that it helps me a lot.
Thanks
 

danadak

Joined Mar 10, 2018
3,777
Does FM Radio and Walkie Talkie each have their own audio amplifier ?

Do they drive the speaker with one side of speaker connected to ground ?

Regards, Dana.
 

Thread Starter

Nidhi123

Joined Jul 24, 2018
7
Does FM Radio and Walkie Talkie each have their own audio amplifier ?

Do they drive the speaker with one side of speaker connected to ground ?

Regards, Dana.
Hello,
Thanks for your reply.
Walkie talkie have own audio amplifier but Radio Fm have not. and in Fm radio output comes our from IC which have audio ouput pin R&L out.
i have used DMR858 module for Walkie talkie and RDA5807P for FM radio.
Thanks.
 
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