On Sat, Nov 26, 2011 at 8:03 AM, William "Chops" Westfield wrote: > ... > and there are assorted Arduino products that are not so popular (Bluetoot= h > is an expensive flop, I think. =A0The "nano" is embarrassingly over-price= d. > The theoretically advanced USB capabilities of the Uno are under-utilized= ..) > We'll have to see what happens next. > Why do you think the Uno has really advanced USB capabilities? Ref: http://www.arduino.cc/en/Main/arduinoBoardUno I think it is mostly a cost-down from FTDI based USB to Serial Converter chips, the Atmega 16U2 (or 8U2) is programmed as a USB CDC-ACM device. You can even say it is a downgrade especially under Windows since the usbser.sys driver is not as stable as FTDI's driver. For Linux and Mac OS X, the Uno solution is not bad since it is "driver-free" as the target OS has the driver built-in. But installation of FTDI driver unde= r Mac OS X is not that difficult either and I bet it will be more stable than the Apple CDC-ACM driver. But you are also right since the Atmega 8u2/16u2 can be programmed with more advanced firmware so yes in a way it is theoretically more advanced. The thing is that the target is not the 8u2/16us but the other Atmega (ATmega328). --=20 Xiaofan --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .