Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For First Responders · Line-Follower Robot

Line-Follower Robot for a robot maze

Built for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field. Simulate a robot maze live below — adjust the inputs and watch it respond, right in your browser.

PID Control

open full solver →

PID ControllerLive

step response tuning

Controls

Presets

Proportional Kp

Integral Ki

Derivative Kd

A PID controller drives a system to its setpoint using three terms: proportional reacts to the current error, integral eliminates steady-state offset, and derivative damps overshoot. Tuning the three gains trades off speed, overshoot, and stability — the workhorse of industrial control.

▶ Run in Python

Data Inspector

Overshoot0%

Settling time0.00 s

Steady-state error0.000

Governing equation

u (t) = 4.0 e (t) + 1.00 \int e d t + 0.5 \frac{d e}{d t}

Reading this result: Balanced gains — proportional for speed, integral to remove offset, derivative to damp overshoot: the textbook well-tuned response.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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Differential Drive

open full solver →

Differential Drive RobotLive

wheel speeds → path

Controls

Presets

Left wheel speed

Right wheel speed

Speed1×

A differential-drive robot steers by spinning its two wheels at different speeds — like a tank. Equal speeds go straight, a difference curves the path, and opposite speeds spin in place. Its forward speed is the average of the wheels and its turn rate is their difference over the wheelbase.

▶ Run in Python

Data Inspector

Forward v2.50

Turn rate ω0.030

Turn radius83

Governing equation

v = \frac{v _{r} + v _{l}}{2} = 2.50, ω = \frac{v _{r} - v _{l}}{L} = 0.030

Reading this result: The faster right wheel pushes the robot into an arc that curves toward the slower left side, with radius set by how close the two speeds are.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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Also for:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students General version →

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Frequently asked questions

Is this good for first responders?: Yes — this version of "Line-Follower Robot for a robot maze" is framed for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.