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Engineering & physics, demystified

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Adaptive PID Thermal Equilibrium Stabilizer

Design a control system that maintains a target temperature in a localized chamber despite exogenous thermal disturbances. You must implement a discrete-time PID algorithm that dynamically adjusts for process lag and non-linear heat dissipation rates. The final solution must demonstrate a settling time under 60 seconds with steady-state error tolerance below 0.5 degrees Celsius.

Materials: Microcontroller (Arduino/ESP32), power MOSFET, resistive heating element, thermistor, breadboard, jumper wires, and insulated styrofoam container.

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How a Prosthetic Hand Moves

How engineers copy the body's own signals to control a robotic hand.

How a CPU Thinks (in 60 seconds)

A chip that does one tiny thing billions of times per second.

Why Bridges Don't Fall Down

The quiet battle between weight and support.

Gears: Trading Speed for Force

How spinning circles give you muscle — or speed.

How a Zipper Works

Two rows of teeth that lock — and a slider that does the magic.

How LyraVegaSci works

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Clear, bite-sized lessons across engineering and physics, written for curious people.

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Interactive guided problems and a knowledge check make sure it actually sticks.

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Every lesson ends with a DIY experiment you can build at home with everyday materials.

Background: NASA/ESA Hubble