Circuit Cubes are electronic building blocks designed by STEM teachers to add power, motion, and light to LEGO bricks and other creative projects.
Schaltungswürfel is a line of educational electronic building blocks created by Tenka Inc. (Tenka Labs). Designed to seamlessly integrate with LEGO®-style bricks, these modular cubes enable children and hobbyists to add power, lights, and motion to their creations without the need for soldering or complex wiring. The system centers on three main components: a rechargeable Battery Cube, a high-torque Motor Cube, and an ultra-bright LED Cube.
Focused on STEM and STEAM education, Circuit Cubes encourage open-ended play and hands-on learning of basic mechanical and electrical engineering concepts. Beyond standalone mechanical builds, many kits feature Bluetooth connectivity, allowing users to control their robots and vehicles remotely via a dedicated smartphone app. The brand provides a variety of themed kits—from robotic battles to vehicle garages—that foster creativity and problem-solving skills.
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A flashing red LED on the Battery Cube indicates a short circuit. The power output is temporarily disabled to allow you to troubleshoot the connection.
Yes, Circuit Cubes are designed to fit vertically or horizontally with standard LEGO-style bricks, allowing you to integrate electronics directly into your builds.
The Battery Cube is rechargeable via a standard micro-USB cable. A green light indicates it is charged and ready to use.
The free Circuit Cubes app connects to Bluetooth-enabled cubes, transforming your smartphone or tablet into a remote control for driving vehicles or operating robotic mechanisms.