Go Down

Topic: LM339 (Op amp chip) with arduino.. safe currents? (Read 1 time) previous topic - next topic

mahela007

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?

mahela007

Ok.. I found the answer myself.
You just have to read the 'source current' spec in the op-amp datasheet.

terryking228

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.

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

Go Up
 


Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

Arduino
via Egeo 16
Torino, 10131
Italy