/diy/ - Do It Yourself

I'm going to convert a radio into an internet radio / bluetooth speaker.
It has a TDA7266 amp that I'm planning on reusing, along with buttons and a 16x2 LCD (16-pin). It's got a 9V supply and an LM1117T 3.3V regulator and an LM2937ET 5V regulator.
It would be nice to be able to run it off lithium batteries, but I'm guessing the current setup is probably too inefficient.. Should I consider just buying a small d-class amp and running 5V?

I'm planning on using these:
https://www.ebay.com/itm/ESP-WROOM-32/202115988537
https://www.aliexpress.com/item/PCM5102A-DAC/32877909874.html
And I guess I should order a breadboard and jumper wires as well.

I'm looking at running this, but I would like to be able to switch between internet radio and bluetooth speaker functionality:
https://github.com/MrBuddyCasino/ESP32_MP3_Decoder
The author has this to say about the issue:
>"The problem is that Bluetooth consumes a lot of RAM, and the web radio needs a lot of it, especially for AAC. It is currently not possible to dynamically allocate and de-allocate the Bluetooth memory, which makes switching between the two modes during runtime impossible. You might get around this if you use a module with external PSRAM."
Does this mean that you could make it work but just need to reboot the thing?