LM339 and LM324N Functions


what does the LM339 and LM324N DO?
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

MCP4231
U1
MCP4231
Ohm meter read

Ohm meter read
3y
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10
Square wave output probe

+/- 5v square wave
3y
Square wave output probe
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7
Square wave amplification and offset

Square wave amplification and offset
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8
Positive side of voltage rail

Positive side of voltage rail
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1
Voltmeter reference points going through difference amplifier

Voltmeter reference points going through difference amplifier
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4
I am probably gonna scrape this and make a new one

I am probably gonna scrape this and make a new one
3y
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11
Sinewave Output (Inverting OpAmp side)

Sinewave Output (Inverting OpAmp side)
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12
Dc Reference output

Dc Reference output
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9
Rail splitter

Rail splitter
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3
Negative side of voltage rail

Negative side of voltage rail
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2
please explain what R4 does.

@copilot please explain what R4 does.
2y
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14
Voltmeter compare and output

Voltmeter compare and output
3y
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5
TL071
Final_Design thumbnail