Hey everyone, my name is Tommy and I am new to this forum. I am currently about to start work on a new project, building an amp to drive my two outdoor speakers using ESP32.
Currently, my parts list is as follows:
- ESP-WROOM-32
- 12V Power Supply
- 12V to 5V Buck Converter
- Adafruit MAX 9744
- 2 Outdoor Speakers
I have to admit I forgot to check the speaker specs this morning before designing at work, so the amp may change if needed.
My current schematic is as follows:
I am newish to circuits and was hoping someone more knowledgeable than me could take a look at the current schematic and let me know if I am missing anything or is there would be a better way. Thanks and apologies for the crappy schematic in paint 
Edit: Dont look at the legend. Blue is the data wire, red are power, and black are ground!
Transformers only work using AC current. They don't work with DC.
Thank you for the reply! I didn’t think about the regulator changing the AC power to DC. So a buck converter cannot be used if it’s powered from a wall outlet through a regulator in the power adapter. Are there any other options for working with DC current? I know I can use the usb for the USB and 12v for the amp via a separate power supply but I’d really rather not have to have multiple power supplies if possible.
Actually, it’s not a transformer it’s a buck converter. Basically just a step down. The symbol is for a transformer only as a place holder bc I threw the schematic together quickly. Correct me if I’m wrong, but I thought buck converters were used to step dc current down to a lower voltage dc current right?
I think you should have drawn a rectangle and labeled it 'DC - DC Converter' to avoid the question.
You are 100% correct I should have. Like I said I’m new to most of this and I threw it together while at work. Researching and learning as I go. Thank you for the advice!
