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. They are already available in the simulator library.

How long does it take?

About 15 minutes, intermediate level, in 3 guided steps.

What should I know before starting?

The previous tutorial in the series, “Read a potentiometer”, 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

2 · Inputs & sensors

Convert to volts (map & float)

Intermediate15 min

Goal

Turn the ADC's 0–1023 into a 0.00–5.00 V reading.

Why it matters

A raw reading means nothing: scaling is the heart of instrumentation.

What you need

Arduino UNO board

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

Steps

01Read A0.
02Compute volts = value * 5.0 / 1023.0 (watch out for floats).
03Print with 2 decimals: Serial.println(volts, 2).

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. They are already available in the simulator library.
How long does it take?: About 15 minutes, intermediate level, in 3 guided steps.
What should I know before starting?: The previous tutorial in the series, “Read a potentiometer”, 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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