This solar tracker system uses the Arduino UNO board, a servomotor, 2 LDRs and 2 resistors to rotate the solar panel towards the Sun or a source of light. Here https ...

the Serial Servo Arduino Shield, and the Serial Servo Breakout. Each of these devices offers unique features and capabilities, making them suitable for a wide range of applications. Other articles ...

This is great for attaching small, powered sensors using a three-wire cable like the one that you use for servos. (Hackaday.io has two Arduino clones using SVG pinouts: in SMT and DIP formats.) ...