I have 2 MCU's, STM32 blue pill and Teensy 3.2.
I want to connect the Teensy 3.2 to external TRRS connection (using the DAC of the Teensy). I understand that I need some audio amplifier to be able to get the sound on the earphone properly.
I have looked on Ebay and there is so many different modules (like: MAX98306, LM386, PAM8403, TPA2005D1) so I just got lost... What is the preferred cheap audio amplifier I should buy/build? (the preferred for Teensy 3.2 DAC and a different preferred for the STMm32 Bluepill (because he doesn't have dac so he will probably need a different amplifier)
If there is some breakout that have TRRS with all the needed staff that I can just connect him to the STM32 Bluepill and/or to the Teensy and it's will just work (i.e. I will get a proper sound in the earphone from the MCU and get proper sound in the MCU from the headphone microphone) it's will be probably the best choice for me (unless it's cost a lot (like more then 7$ per unit), then we are back to build it my self...).