Re: Serial port isolation

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  1. - 11th September 2007, 04:31 #6
    Steve_88's Avatar
    Steve_88
    Steve_88 is offline Junior Member
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    Hi Squib,

    The microchip application note shows a 470 ohm resistor from the TX output to a 1N4148 diode then onto the opto.

    TX -------/\/\/\/-----------1N4148---------optodiode--------ground

    Is this the same general idea you suggested?

    I'll attach the appnote, AN811

    Thnks,
    Steve
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