16-bit port expander with 74HC595D

2 layer board of 1.14x2.05 inches (28.91x52.07 mm).
Shared on January 27th, 2014 23:08.

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I/O Port Expander for Arduino Pro Mini

2 layer board of 1.84x1.30 inches (46.66x33.02 mm).
Shared on January 24th, 2014 20:12.

14 ports with ULN2003 for Arduino Pro Mini

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