Tinycircuits small form factor tinycircuits asm2001 r b the tinycircuits tinyduino is an arduino compatible board in an ultra compact package measuring only 20 x 20mm 079 x 079in the tinyduino processor board is basically equivalent to the arduino uno board with the same processor and the same signals brought out to a shield connector in fact most arduino sketches will work without any changes a supporting cast of tinyshields is available including the usbicp shield 73 4752 for p