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Cheap usb I/O card schematic

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Cecemel

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Hey!
I'am searching for a cheap I/O card schematic. I now i'am gonna have to use an IC chip but i don't now how to upload any code to it so, if that is required, please guide my trough that too.
Regards Cecemel
 

Hi,
I use CP2102 and FT230 both of them are handy chip as usb-serial bridge. By using such a bridge only you need add some circuit to change serial output to parallel.
Regards
 

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