Discussion in "General help Guidance and Discussion" started by    Luqman    Jul 9, 2010.
Fri Jul 09 2010, 08:48 pm
#1
I require schematic for RS 232 to RS 485 converter circuit which should be on with connecting to the PC and do not require +5V or any supply.
Sun Jul 11 2010, 09:19 am
#2
Google search and you will find quite a few circuits.

I picked one for you - http://freecircuitdiagram.com/2009/03/24/rs232-to-rs485-converter/
Thu Mar 10 2011, 07:16 pm
#3
Here is a standard RS232 to RS485 converter which is port-powered. These guys have several schematics of this design.
Wed Jun 20 2012, 08:01 pm
#4
hey i want to details about RS-485 and how it can communicate between microcontroller and PC.

please help me....
Thu Jun 21 2012, 05:45 pm
#5
if you just want to communicate between PC and Microcontroller you can use RS232 why you want RS485? any specific reason?
Sat Jun 23 2012, 03:13 pm
#6
acctually i want to learn that hw to communicate b/w PC and microcontroller..
and i can communicate them using RS-232 but i hvn't knowledge of RS-485 so i want information abt it...

please help me...
Sun Jun 24 2012, 09:11 pm
#7
RS485 and RS232 uses same low level uart communication, but both have different physical characteristics. Read serial communication tutorial here:
http://www.8051projects.net/microcontroller-tutorials/
Tue Jul 03 2012, 04:35 pm
#8
hey ajay...

i cant get any helpful things from the above tutorial so please give me details of RS-485 please...
Wed Jul 04 2012, 02:13 am
#9
I just hope you understand what I said in my last post about low level communication.what I meant was, you need to first learn about uart before you can work on RS485. If you're comfortable with uart then go to wikipedia and read about RS485.

What kind of device are you going to communicate with your controller over RS485? is it a MODBUS device?
Wed Jul 04 2012, 04:23 pm
#10
ok i ll learn and ask if any query...

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