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Can I use 741 op amps instead of 1 LM324 in a heart rate sensor? Answered

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steveastrouk (author)2014-09-30

You COULD do, but the 324 is a better amp.

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iceng (author)2014-09-29

741s run hot because they drink current.

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iceng (author)iceng2014-09-30

BTW LM324 the better choice is a quad ( 4 in a dip ) op-amp IC

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iceng (author)iceng2014-09-30

The lm324 uses 0.7ma for all four and can work down to a 3volt supply.

The lm741 uses 3ma to 15ma for each op-amp and needs a +-15volt supply.

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tomatoskins (author)2014-09-29

Short answer is yes. As far as I can remember from my simiconductors class the chariceristics of both (for what you're wanting to do) are pretty much the same.

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