This is the "Sensometer", a great example of IoT! Get all sensors working at once!

MEGA BREAD series #4, the 4 by 4 input keypad.

The Arduino world offers a ton of H/W options and excellent S/W. Making a real industrial project out of it... not so easy.

The Mega-Bread project is alive and well!

A high power and highly programmable smart battery charger, LED driver and programmable DC source all in one.