2 ms·
https://www.sparkfun.com/products/9450 https://www.sparkfun.com/products/9450 it's not business card sized, but it'd probably fit in a pocket.
by solistice 13y ago
https://www.sparkfun.com/products/9450 https://www.sparkfun.com/products/9450
it's not business card sized, but it'd probably fit in a pocket.