How Do LCD Screens Work?
Using liquid crystals and polarizers to block or allow light through to form images.
How Do Night Vision Goggles Work?
Amplifying ambient light and near-infrared light to see in the dark.
How Do Noise-Canceling Earbuds Work?
Using internal and external mics to generate inverted sound waves directly in your ear.
How Do Toasters Work?
Passing electricity through nichrome wire to generate intense, toasty heat through resistance.
How Do Touch Screens Work?
Capacitive and resistive touch technologies that make modern smartphones possible.
How Do Traffic Lights Know Cars are There?
Inductive loops, radar, and cameras used for traffic management.
How Does a Battery Charge?
Forcing electrons back to the negative terminal using an external electrical source.
How Does a Metal Detector Work?
Inducing a magnetic field and sensing the distortion when it hits metal.
How Does a Thermostat Work?
Bimetallic strips, thermistors, and how your house knows when to turn on the heat.
What is a Capacitor?
An electronic component that stores electrical energy in an electric field.
What is a Diode?
A semiconductor device that acts as a one-way switch for current.
What is a Microcontroller?
A compact integrated circuit designed to govern a specific operation in an embedded system.
What is a Microprocessor?
The central processing unit (CPU) contained on a single integrated circuit chip.
What is a Semiconductor?
The foundation of modern electronics: materials that conditionally conduct electricity.
What is a Transformer (Electrical)?
A passive component that transfers electrical energy between circuits, altering voltage.
Battery Science for Robotics
Your battery is your fuel tank. Learn about internal resistance, voltage sag, and why you should never charge at 4A.
Custom Sensor Boards: Beyond the Rev Hub
Why pay $40 for a sensor you can build for $2? Designing custom PCBs for break-beams and limit switches.
Solder Splices vs. Wagos: Reliability at Scale
The great debate. Permanent vs Reusable. We test conductivity, vibration resistance, and repairability.