Do I need to buy hardware for this tutorial?

No. Everything runs in the browser: Circuitly simulates the board, the components and the code. Real hardware is optional if you want to rebuild the circuit afterwards.

Which components are used?

Arduino UNO board, 10 kΩ potentiometer, Relais 1 canal. They are already available in the simulator library.

How long does it take?

About 40 minutes, expert level, in 4 guided steps.

What should I know before starting?

The previous tutorial in the series, “Detect a freeze (watchdog)”, is enough preparation. No software install is required.

Is the code provided and checked?

The simulator checks your wiring and your code automatically at every step, and shows the commented solution if you get stuck.

All tutorials

6 · Full projects

Project: thermostat

Expert40 min

Goal

Regulate a target temperature with hysteresis and a display.

Why it matters

Your first complete closed loop: measure → decide → act → feedback.

What you need

Arduino UNO board
10 kΩ potentiometer
Relais 1 canal

Nothing to buy: every component below is simulated in the browser.

Steps

01Temperature sensor as input, relay as output.
02Setpoint adjustable with the potentiometer.
03±1 °C hysteresis to avoid short cycles.
04Show setpoint, reading and heating state.

This tutorial runs inside the Circuitly simulator: your wiring and your code are checked automatically at every step.

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Frequently asked questions

Do I need to buy hardware for this tutorial?: No. Everything runs in the browser: Circuitly simulates the board, the components and the code. Real hardware is optional if you want to rebuild the circuit afterwards.
Which components are used?: Arduino UNO board, 10 kΩ potentiometer, Relais 1 canal. They are already available in the simulator library.
How long does it take?: About 40 minutes, expert level, in 4 guided steps.
What should I know before starting?: The previous tutorial in the series, “Detect a freeze (watchdog)”, is enough preparation. No software install is required.
Is the code provided and checked?: The simulator checks your wiring and your code automatically at every step, and shows the commented solution if you get stuck.

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