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Isolate uart of two MCu

A

Thread Starter

aamirali

Joined Feb 2, 2012
412
I have to isloate uart of two MCU with the help of optocoupler.
I have made a circuit which I had attached.

is it the correct way to do?
For me its looks ok.
 

Attachments

ericgibbs

ericgibbs

Joined Jan 29, 2010
18,848
Hi,
The signal polarity looks OK.
The 1K's are too high in value, I would suggest 270R or 330R in order to get a fast/hard switch On of the Emitter LED's.

E
 
Shagas

Shagas

Joined May 13, 2013
804
Looks good. What baud rate are you planning on using ? If it's high then I suggest you check out the datasheet of the optocoupler to make sure that it has fast enough rise/fall times because last optocoupler that I worked with was pretty slow. This could (potentially) be a problem to you but most likely not.
 
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