Difference between revisions of "Audio power amplifier"

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[[Image:Audio_amplifier_view.jpg|500px|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.
== Report ==
*  Project report: [http://beta.ivancover.com//electronics/ele103_effektforsterker_for_lyd.pdf Effektforsterker for lyd] - In norwegian, pdf


== Circuit ==
== Circuit ==
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[[Image:Audio_amplifier_side.jpg|400px]]
[[Image:Audio_amplifier_side.jpg|400px]]


[[Image:Audio_amplifier_overview.jpg|400px]] [[Image:Audio_amplification_bottom.jpg|400px]]
[[Image:Audio_amplifier_overview.jpg|400px]] [[Image:Audio_amplifier_bottom.jpg|400px]]


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


[[Image:Audio_amplifier_oscilloscope.png|400px]]
[[Image:Audio_amplifier_oscilloscope.png|400px]]
== Report ==
*  Project report: [http://beta.ivancover.com//electronics/ele103_effektforsterker_for_lyd.pdf Effektforsterker for lyd] (Norwegian)

Latest revision as of 20:38, 19 February 2011

Audio amplifier view.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