Isolating serial noise

[Chris]

Can i isolate my pic from my pc's noise by using 2 optocouplers and
powering the serial comms from the serial port as in the schematic?

http://chrispol.ath.cx:8080/serial.jpg

Thanks for any input / pointers

 

[Gerard Bok]

On Tue, 18 Jan 2005 19:22:56 -0500, Chris <chrispol@videotron.ca>
wrote:

Can i isolate my pic from my pc's noise by using 2 optocouplers and
powering the serial comms from the serial port as in the schematic?

http://chrispol.ath.cx:8080/serial.jpg

Might work, bot not guaranteed.
This circuit requires your serial port voltage levels to be some
9 volt. They often are, but can be as low as 5 volt.
If your PC is a laptop, it is not likely to work at all.

If you have the option: an ethernet port on your PIC would be a
far better solution.

--
Kind regards,
Gerard Bok

 

[Chris]

Gerard Bok wrote:

On Tue, 18 Jan 2005 19:22:56 -0500, Chris <chrispol@videotron.ca
wrote:


Can i isolate my pic from my pc's noise by using 2 optocouplers and
powering the serial comms from the serial port as in the schematic?

http://chrispol.ath.cx:8080/serial.jpg


Might work, bot not guaranteed.
This circuit requires your serial port voltage levels to be some
9 volt. They often are, but can be as low as 5 volt.
If your PC is a laptop, it is not likely to work at all.

If you have the option: an ethernet port on your PIC would be a
far better solution.

The problem with this would be added devel cost might need an extra pic
due to codespace and also the problem of an thernet interface,

Thanks

 

[Gerard Bok]

On Wed, 19 Jan 2005 08:36:54 -0500, Chris <chrispol@videotron.ca>
wrote:

Can i isolate my pic from my pc's noise by using 2 optocouplers

If you have the option: an ethernet port on your PIC would be a
far better solution.

The problem with this would be added devel cost might need an extra pic
due to codespace and also the problem of an thernet interface,

I know. But you asked for pointers
I understand, that some PICs now come with ethernet support built
in. You could look at http://www.lvr.com/ethernet.htm

Thanks

You're welcome

--
Kind regards,
Gerard Bok