This projects allows flashing of Arduino UNO R3 via USB Mass Storage (i.e., file copy or drag and drop without needed to install any software). It implements it in firmware of the ATmega16u2 - the USB ...
Be prepared with additional items of varying sizes. Items that are too small (such as a dime) and too large (such as the opening of an umbrella) tend to be less accurate. After the measurements have ...