Guides

UV Index Sensing with the GUVA-S12SD

How the GUVA-S12SD detects ultraviolet light for building a simple UV index monitor.

How to Build a Line-Following Robot

A practical guide to building a line-following robot, from sensor choice to motor tuning, with help from Compoden's AI build assistant.

How to Build a 4-DOF Robotic Arm

A practical guide to building a 4-DOF robotic arm, covering joints, servo choice, power, and steady control.

How to Use a PIR Motion Sensor (AM312 and HC-SR...

A practical comparison of the AM312 and HC-SR501 PIR motion sensors and how to wire them.

Build a Smart Aquarium Monitor

A guide to building a monitor that keeps an eye on aquarium water temperature and level.

Light and Proximity Sensing with the APDS-9930

Using the APDS-9930 to add ambient light and proximity detection over I2C.