Regarding the power input, we prefer feeding it through an external 20÷30V brick PSU such as the ones used for laptops or old printers: this solution is safe and cheap, but you can choose to use ...

Arduino board uses quad-core ARM CPU for the power of “4 Raspberry Pis. ... Power of Arduino and Raspberry Pi combined in $99 Android ... 54 Digital I/O + Analog Input (Arduino-compatible R3 1.0 ...