Tinkercad Pid Control

Use the Serial Plotter to graph your setpoint vs. your input . Seeing the lines converge in real-time is the "Aha!" moment for most students.

The Proportional term drives the correction based on the current error. If the error is large, the output is large.

Tinkercad is a free, web-based 3D design and simulation platform developed by Autodesk [8†L17-L19]. It features a powerful module that allows you to build and simulate electronic circuits using an Arduino Uno, various sensors, motors, displays, and other components [8†L18-L19]. This virtual environment is ideal for learning because it:

While effective for basic logic, the simulation can be and may struggle with complex analog circuits or high-noise environments compared to professional tools. Educational Value

void loop() // Read the temperature sensor float voltage = analogRead(tempSensorPin) * (5.0 / 1023.0); Input = (voltage - 0.5) * 100.0; // Convert voltage to temperature in °C tinkercad pid control

If your motor stops just short of the goal (steady-state error), increase Ki slightly to force it to finish the job. Why Use Tinkercad for PID?

Wiring:

void loop() { // 1. Read Inputs targetPosition = map(analogRead(setpointPin), 0, 1023, 0, 255); currentPosition = map(analogRead(sensorPin), 0, 1023, 0, 255);

Example code snippet for simulated thermal plant: Use the Serial Plotter to graph your setpoint vs

Now, let's write the Arduino code to implement the PID algorithm. For this example, we will use a simple PID library available online.

) between a desired setpoint and the actual sensor value. It then applies three corrections: Proportional (P): Reacts to the current error. Integral (I):

Pairs a temperature sensor (TMP36) with a heating element (often a power resistor or transistor) to hold a steady heat level.

Proportional control alone suffers from "steady-state error." As the system nears the setpoint, the error drops, the correction drops to near-zero, and the system stalls just short of the target. 2. Integral (I) — The Past Accumulation The Proportional term drives the correction based on

The Proportional term drives the system based on the current size of the error. If the error is large, the correction is large.

Slowly increase Ki (try intervals of 0.1). This drives the steady-state error down to zero. If the LED flashes wildly, lower this value immediately. 4. Dampen the Motion

Allows the low-power Arduino to control high-power motor pulses.