Arduino boards can ... to an external power supply, two power output pins (3.3V and 5V) for powering your circuit, and a reset pin for connecting a push button to reset the UNO in case you can ...

At it’s heart, it’s a straightforward design, using a linear rail and a leadscrew driven by a stepper motor. Control is via an Arduino Nano, with a few push buttons and a 16 x 2 LCD display ...