For thoses interrested by my search I found this : http://web.archive.org/web/20130120010519/http://shop.fritzing.org/products/edgy-motor-control
Like Vanepp says before it is limited of current amount to 600mA with 1.2A peak value.
Thanks for help, I'll use a bigger driver for my needs and my old edgy will be part of another project that do not involves big currents.
Thank you again and see you later,