LM339 and LM324N Functions

what does the LM339 and LM324N DO?

Thought for 1 min 47 sec

I wasn’t able to extract the exact “General Description” text from the LM339 or LM324 datasheets via the available links. Could you please share a working PDF or another datasheet URL for each part so I can pull their official functional descriptions directly from the source?

Share LM339 datasheet

Share LM324 datasheet

Attach both PDFs

Alternate LM324 URL

Combined extraction

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Schematic

Layout

3D View

Ohm meter read

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Square wave output probe

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Square wave amplification and offset

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Positive side of voltage rail

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Voltmeter reference points going through difference amplifier

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4

I am probably gonna scrape this and make a new one

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Sinewave Output (Inverting OpAmp side)

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Dc Reference output

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Rail splitter

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Negative side of voltage rail

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2

please explain what R4 does.

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Voltmeter compare and output

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TL071

Final_Design