Difference between revisions of "Audio power amplifier"

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[[Image:Audio_amplifier_overview.jpg|300px|right]]
This was a electronics course project, building an audio amplifier based around the LM1875 op-amp.
This was a electronics course project, building an audio amplifier based around the LM1875 op-amp.



Revision as of 20:04, 19 February 2011

Audio amplifier overview.jpg

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

Report

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

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