To make a small acoustic receiver

[vavapg]

Hello~
Is there anyone good to make a simple acoustic receiver,just like using an IC to connect several capacitors?
Someone pose a picture just as follow.And said that is to make a small amplifier with a single chip and the making of mono loudspeaker and double channel loudspeaker are in this picture.
But...I am new here.Can not understand that very well.Is there a simple one to make?Or who can help explain this picture?

The data is from http://www.kynix.com/Search/TDA7050.html
Thanks so much.

 

[berkeman]

Welcome to the PF.

That IC and the circuits are for generating sound, not for receiving sound. For receiving, you need to use a microphone and some sort of amplifier circuit. What do you want to do with the received audio signal?

You can look at electronics kits as a good way to learn about various kinds of circuits. Here are some that include the microphone and a low-power FM transmitter, so you can hear your voice coming through your FM radio when you tune it to the matching channel...

https://www.lelong.com.my/ht699-fm-transmitter-microphone-electronics-diy-hobby-kit-set-hitectrons-162517356-2016-04-Sale-P.htm

 

[jim hardy]

Try a search on "Super Snooper Big Ear" hobby kit.
and see
http://www.nutsvolts.com/magazine/article/the_big_ear