This project is an audio amplifier based on TDA2050 and LM1875.
This is not an ordinary project, but an attempt to make a PCB that is suitable for TDA2050 and LM1875 and has all the necessary circuitry on board – power supply, speaker protection, delayed turn-on and fast turn-off. This is achieved using the convenient uPC1237 IC.
TDA2050 and LM1875 are pin to pin compatible, the differences in their schematics are the values of a couple resistors and one capacitor. All this allows to make an universal circuit board, suitable for any of these two ICs.
Audio Power Amplifier with TDA2050 - [Link]
A simple Hi-Fi amplifier which is built using a single TDA2050 chip. The circuit is very simple and can easily be constructed on a perfboard or point-to-point so it makes for a good first DIY Audio Project. The power output is about 25W into 8 ohms. The performance of the amplifier is very good (see datasheet) and the fidelity is also very good – comparable or better than most Hi-Fi Class-AB amps which often cost much more.
DIY TDA2050 Hi-Fi Chip Amplifier - [Link]