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Author Topic: LM339 (Op amp chip) with arduino.. safe currents?  (Read 910 times)
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Can this circuit be powered by the +5V supply from an arduino?
http://reipooom.files.wordpress.com/2011/07/lm339.png

I know Op-amps have high input impedance at the inverting and non-inverting terminals. But what about the + and - voltage terminals? Will they draw too much current?
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Ok.. I found the answer myself.
You just have to read the 'source current' spec in the op-amp datasheet.
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Hi, right answer..

But for information: LM339 is a Comparator:

Compares two analog voltage values and gives a digital output HIGH or LOW, 1 or 0

LM339 has 4 comparators in one package.

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Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
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