Audio power amplifier

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This was a electronics course project, building an audio amplifier based around the LM1875 op-amp.

Circuit

The circuit was constructed after calculating the amplification, upper and lower frequency band, according to the specifications.

Audio amplifier circuit.png

Final

This shows the final circuit, mounted to a flexi-glass plate to balance the enormous heatsink and protect the bottom traces.

Audio amplifier side.jpg

Audio amplifier overview.jpg Audio amplifier bottom.jpg

Audio amplifier overview.jpg

Measurements

Measuring the input and output signal using a oscilloscope will verify if the circuit is designed correctly, which it turned out to be.

Here the amplifications is about 25 (9.8V/0.4V).

Audio amplifier oscilloscope.png

Report