How to select one input from multiple input? Audio amplifier TDA7297+ SDcard module + jack 3.5mm

[duykwe]

Hello everyone. I am new here. I am making an audio amplifier with TDA7297 15W+15W. I take the input from the jack 3.5mm and I also input from the SD card module (it can decode the data into audio signals already, it is called DFplayer mini ). I want there is a switch and when I switch it takes the input from the jack 3.5mm and switches off the SD card module, and when I switch to the SD card mode, it switches on and then plays when I hit the buttons or something. Is that possible? My background isn't so good, I'm a newbie so hope you guys can help me to figure this out. Thank you so much

 

[duykwe]

This is the DFPlayer that I talk about

 

[hbiss]

A simple two pole double throw rotary switch will do that for you. You need to switch both channels. You will have to build a case for the electronics and on that case will be a 3.5mm input jack. That jack will go to one side of the switch, the output of the SD card player will go to the other. The common from the switch goes to the input 3.5mm jack on the amp module.

-Hal

 

[LarryFine]

Two diagrams of the same thing:

 

[duykwe]

A simple two pole double throw rotary switch will do that for you. You need to switch both channels. You will have to build a case for the electronics and on that case will be a 3.5mm input jack. That jack will go to one side of the switch, the output of the SD card player will go to the other. The common from the switch goes to the input 3.5mm jack on the amp module.

-Hal

Two diagrams of the same thing:

View attachment 2568703 View attachment 2568704

I got you guys' idea, it's really helpful. Thank you so much.