| Author |
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Chris
Guest
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 Posted:
Wed Jan 19, 2005 6:22 am Post subject:
Isolating serial noise |
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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
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Gerard Bok
Guest
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| Posted:
Wed Jan 19, 2005 6:02 pm Post subject:
Re: Isolating serial noise |
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On Tue, 18 Jan 2005 19:22:56 -0500, Chris <chrispol@videotron.ca>
wrote:
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 |
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Chris
Guest
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| Posted:
Wed Jan 19, 2005 7:36 pm Post subject:
Re: Isolating serial noise |
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Gerard Bok wrote:
| Quote: | 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
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Gerard Bok
Guest
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| Posted:
Wed Jan 19, 2005 9:34 pm Post subject:
Re: Isolating serial noise |
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On Wed, 19 Jan 2005 08:36:54 -0500, Chris <chrispol@videotron.ca>
wrote:
| Quote: | 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,
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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
You're welcome :-)
--
Kind regards,
Gerard Bok |
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