The CD drive mechanism is the heart of your CD player. You can salvage one from an old CD player or purchase a spare part online. Make sure it's compatible with your microcontroller and has a decent reading mechanism.
The audio amplifier boosts the analog audio signal to drive a speaker. You can use a dedicated amplifier IC or a simple transistor-based amplifier. cd player diy
If you want to create a more traditional CD player experience, you can add a front panel and buttons to control playback, pause, and track selection. The CD drive mechanism is the heart of your CD player