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  1. #1
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    RS232 TO PIC16F877A without MAX232

    (my RS232 voltage levels are +10.2v and -10.2v)
    I want to connect my PC serial port (only TxD) to PIC16f877a. But now, i don't have a MAX232 for level conversion. So can i use the below circuit?

    Now i read somewhere that RS232 have +ve as logic 1 and -ve as logic 1.
    Then, should i invert the signal just before connecting to pic?

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  2. #2
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    Re: RS232 TO PIC16F877A without MAX232

    the simplest thing is to use a USB to 3.3v serial cable, e.g.
    USB TTL Serial



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  3. #3
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    Re: RS232 TO PIC16F877A without MAX232

    Quote Originally Posted by horace1 View Post
    the simplest thing is to use a usb to 3.3v serial cable, e.g.
    usb ttl serial
    your reply is not to my question.

    ---------- Post added at 17:01 ---------- Previous post was at 17:00 ----------

    I don't have that cable u mentioned....U r telling about usb to rs232 converter...Yes i know it could be obtained from old model nokia phone usb cable......
    but i dont have that cable with me.....



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  4. #4
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    Re: RS232 TO PIC16F877A without MAX232

    Solved..............



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