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View Full Version : [Question(s)] Need recommendation for USB or PCMCIA to RS232 (For AVR or PIC use)



nizee
07-30-2008, 05:48 PM
Friend wanted to give me AVR programmer board for me to try to learn but it use serial RS232 connector, but i don't have it on my labtop.
I was told centain USB to serial converter don't work.

Can anyone recommend me (try & true if possible) ready made USB to RS232 or even PCMCIA to RS232, that support AVR or PIC development/programmer board,.... eeerrr....cheap?

That way, i can get started learning the AVR immediately.
Will this USB to RS232 works?
http://www.dlpdesign.com/usb/us232cable.shtml
USB base on FTDI chipset.

Any help would be appreciated.

PS : I saw eBay sell a lot of those USB/PCMCIA to serial RS232 adapter really cheap. Which one will work best?

Adrenalynn
07-30-2008, 06:06 PM
You can't use USB to Serial for any of the AVR programmers that I use/am familiar with.

The PCMCIA adapter MUST have a 16**50 UART, like a 16550, 16C550, 16950, 16C950, etc.

*none* of the USB to '232 will work, including the one you linked to. It's just one of the hardware limitations of USB->RS232

nizee
07-30-2008, 06:22 PM
thanks for the reply

Will these work?
<20$
http://cgi.ebay.com/RS232-SERIAL-DB9-CARDBUS-PCMCIA-CABLE-ADAPTER-FOR-GPS_W0QQitemZ130242252414QQihZ003QQcategoryZ74953Q QssPageNameZWDVWQQrdZ1QQcmdZViewItem

or

$56.98
http://www.allserial.com/pcmcia_mg-1scb_serial_adapter.html

Both 16C950 UART compatible and Backward compatible with 16C550 UART.

Adrenalynn
07-30-2008, 06:31 PM
By specification only (ie. I haven't used that particular device), the first linked item should work fine.

I've used the one in the second link with an AVR STK500 programmer and can confirm that it works well.

nizee
07-30-2008, 09:12 PM
Good and comfortable to know that you have tried the one on the second link and it works.

Did you try the single RS232 port or the dual? Wonder if the dual RS232 works the same for $10 more.
http://www.allserial.com/pcmcia_mg-2scb_serial_adapter.htm

Adrenalynn
07-30-2008, 11:59 PM
I have a dual and a quad from the same manufacturer. I work on network equipment frequently and a good serial port or four or sixteen is a requirement.

nizee
07-31-2008, 12:10 AM
Thanks again Adrenalynn.
I'm about to pull a trigger to go ahead to buy one already.
I saw one of the website selling at good price for the 2 ports serial, but the speed is at 921,600 bps. I'm not sure if it's a problem with those AVR or PIC board. This card is base on OXFORD OX16CF950B chipset.

Here the website: -
http://www.byterunner.com/byterunner/product_name=MG-2SCBH/user-id=/password=/exchange=/exact_match=exact

dmlmax
03-25-2010, 11:50 AM
Friend wanted to give me AVR programmer board for me to try to learn but it use serial RS232 connector, but i don't have it on my labtop.
I was told centain USB to serial converter don't work.

Can anyone recommend me (try & true if possible) ready made USB to RS232 or even PCMCIA to RS232, that support AVR or PIC development/programmer board,.... eeerrr....cheap?

That way, i can get started learning the AVR immediately.
Will this USB to RS232 works?
http://www.dlpdesign.com/usb/us232cable.shtml
USB base on FTDI chipset.

Any help would be appreciated.

PS : I saw eBay sell a lot of those USB/PCMCIA to serial RS232 adapter really cheap. Which one will work best?



I can recommend you to take a look at usb to serial (http://www.usconverters.com/) adapters at http://www.usconverters.com (http://www.usconverters.com/)