COPPERAS COVE — Future robotic and electrical engineers had the opportunity to learn the basics of programming Arduino boards Saturday at the Copperas Cove Public Library, courtesy of the ...

If you've got an Arduino of any variety, you might have noticed some of the pins on the board have a tilde mark or PWM printed next to them. What is PWM?

Raspberry Pi also has a broader selection of I/Os, such as an audio jack, more USB ports, and more. And with 40 general-purpose I/O (GPIO) pins, you can even daisy chain multiple Raspberry Pis ...