Discussion in "Project Help" started by    spiritgate    Jan 14, 2009.
Fri Jan 16 2009, 05:30 AM
#11
OH! OK thanks! I got it! :-)
Fri Jan 16 2009, 08:26 AM
#12
Please check that your rfid device is RS232 before connecting it to anything
Which rfid device is it ?.

Can you give a link to the C8051F350 board you are using ?.
Fri Jan 16 2009, 08:38 AM
#13
Fri Jan 16 2009, 09:01 AM
#14


the RFID I using is probably this :
http://www.parallax.com/Store/Microcontrollers/BASICStampModules/tabid/134/txtSearch/28142/List/1/ProductID/114/Default.aspx?SortField=ProductName%2cProductName

spiritgate


That device is TTL output (5volts).. so don't connect it to anything until
I/we have had a chance to think about it


the link for micro controller is this, it contain the data sheet of my micro controller :
http://www.keil.com/dd/chip/3682.htm

spiritgate



What you have is a chip ( a C8051F350) soldered to a board with other chips
connectors etc.
The chips are all the same, but different makers make different boards.

Is this the board you have ?
https://www.silabs.com/products/mcu/Pages/C8051F350DK.aspx



[ Edited Fri Jan 16 2009, 09:14 AM ]
Fri Jan 16 2009, 09:21 AM
#15
ya is this!

as for the RFId, will it go burst easily?


[ Edited Fri Jan 16 2009, 09:24 AM ]
Fri Jan 16 2009, 07:58 PM
#16


as for the RFId, will it go burst easily?

spiritgate


It might if you connect it to the +12 and -12 volts of an
RS232 connection.

Connecting the output of the rfid to an RS232 input would not cause harm, but
would not work properly either.
Sun Jan 18 2009, 08:07 AM
#17
its TTL compatible dont even think of connecting it to 12V interface..
Mon Jan 19 2009, 02:27 AM
#18
Very sad now, Left 4 weeks to finish this project... Guys u think 4 weeks can finish this project?
Mon Jan 19 2009, 03:15 AM
#19
Four weeks should be enough.

You'll have to insert a ttl to rs232 level converter,preferably based on MAX232,between the RFID reader and the expansion cable.

Look here : http://www.8051projects.net/serial-communication/introduction.php

Mon Jan 19 2009, 03:16 AM
#20
Ofcourse you can easily finish it out :-) we all here to help u out & u should try ur best.

check out this link for low cost RFID from Digant which is having UART and Wiegand o/p and works perfectly for micro-controller based application.

http://www.diganttechnologies.com/products_LF_1.html

:bye

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