PIC 16F877A programer using USB... HELP!!

[Hamlet]

Hi all.

I need URGENTLY to build a circuit to program a PIC 16F877A but my computer doesnt have serial nor parallel ports... my only option is to use the USB 2.0 port.

Does anyone know where I can get a circuit??
thanks in advance for any help

[mister_e]

use USB to RS232 converter. You'll find them on your local office supplier or computer reseller.

Just be sure it handle/provide common flow control signal as some use them.

Maybe some FTDI chip could do the job.

[Emil G]

Hamlet,
there is interesting USB programmer
http://perso.wanadoo.es/siscobf/
18F2550 is requested.
happy PICing
Emil

[Hamlet]

use USB to RS232 converter. You'll find them on your local office supplier or computer reseller.

Just be sure it handle/provide common flow control signal as some use them.

Maybe some FTDI chip could do the job.

Thanks... by this you mean I can use a adaptor USB - RS232. Does it mean that the programer should have a RS232 conector?. The circuit I saw in the internet has a SUBD9 conector (serial).

Can you show me a circuit that uses RS232 conector? I have already have a USB - RS232 converter.

Thanks.

Hamlet,
there is interesting USB programmer
http://perso.wanadoo.es/siscobf/
18F2550 is requested.
happy PICing
Emil

Thanks you too.
I saw the diagram and all the files. Im not that smart at electronics nor computers...

Do you think I can program a 16F877A using this circuit that uses a 18F2250?

Thanks.

[mister_e]

RS232 is the protocol. SUBD9, DB9 is the connector type.

Freebies PIC-PROG, IC-PROG, PICCALW with their associated interface. Do a google search for them. Can't vouch on them but we heard them a lot of time on various forum

[Hamlet]

thanks.

1 more question.

I found a very simple (and popular) circuit called PIPO2.. Do you think this circuit can work using the USB-RS232 converter?