Thanks _Marcel_ for this instructable. It gave me the inspiration to make a retro look radio.
I modified the software a bit to allow the use of manual tone and volume control, a status indication by means of a three color LED and a different rotary encoder.
Initially I powered the power amp from a 12 V switch mode power supply and converted the 12V to 5 V by means of a DC/DC converter.
This proved to be a very noisy solution and I had to seperate 12V from 5V by using 2 PSUs. My first Power Amp was a ready made module from Aliexpress using a TDA7297 which proved not to be capable of driving 4 Ohm speakers.
I therefore had to make an alternative using a TDA2004 which works perfectly now.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.