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Rs232->Usb Answered

Is there anyway to convert rs232 to usb, even to db25 without the need for fancy chips?

I can spare a 2313 if i have to, or even an atmega8 for the cause, but I NEED a way to convert the USB signal to RS232 levels. (To program other avrs via usb =D)

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frank26080115 (author)2008-03-08

If you want to program AVRs with USB, why do you need RS232?
You can build a USBasp programmer with a ATMEGA8, it also has USB to serial functionality.
All schematics and board design files here
http://www.fischl.de/usbasp/

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tyeo098 (author)frank260801152008-03-09

But that requires a 12mhz crystal, something I dont have.

So if i get Usb=>Rs232 then I can just make a rs232 programmer.

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schorhr (author)tyeo0982008-03-09

Yep, the only solutions to programm via USB require another microcontroller that has to be programmed, too ;)

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tyeo098 (author)schorhr2008-03-09

I can program a uC with my other PC, it has a parallel port, but I cant always get it to work (Ive shorted it a couple of times) So If i get a usb one to work, then I can use my main PC to program. If anyone wants to ship me an old cellphone data cable, thatd be great....

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frank26080115 (author)tyeo0982008-03-09

tough luck, the only other way is to buy something like schorhr suggested.

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