1. The Pixel puppy has touch-sensitive sensors so that it knows when you're petting it. The Pyxel can be programmed using Python or a graphical programming language called Blockly (Fig. 2).

Developers may still prefer text or graphical programming, but the all-or-nothing approach appears to be gone. Many developers wait until something new is thrust upon them.

Basic Programming for PLCs provides an overview of the basic principles, structure, and instructions of PLC programming. Most PLC programs use instructions written in ladder logic, which is a ...