Tinycircuits small form factor tinycircuits asd2101 r the tinycircuits tinyshield usb amp icp adds usb support to the tinyduino having a micro usb connector and using the very popular ftdi usb to serial converter ic stack this board with your tinyduino and download new sketches via the arduino ide or add usb communication capabilities to your projects an essential function is the use of the dtr line from the ftdi ic to support auto resetting into the processors boot loader keeping the p