Recent content by anhnha1

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    Is this wrong with MAX232CPE?

    I used MAX232CPE without any capacitor and power supply is tied.Then I tied the TX of comm port to one pins the the RX of the comm port to another pins of MAX232.Next transmit data to comm port.But i am confusing that I can receive data exactly when TX and RX is tied any pin of MAX232 I have...
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    propblem with RS232 to RS485 Pleased help!

    I am sorry.I have just attach the schematic and the orginal circuit i used to built: http://www.bb-elec.com/bb-elec/literature/485ptbr-3903ds.pdf Would you take a look it and help me with this confusion. Thanks in advance.
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    propblem with RS232 to RS485 Pleased help!

    Hi all, I had do the circuit like that.But I wire up in breadboard it is not work.In my project I need to communicate between computer(COMM PORT) and micro.But now I want to check 2 circuits that I had wire in breadboard: -the first breadboard for RS232 to RS485 -the second breadboard for RS485...
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