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Lab 00

Blink: your first program

Your first Arduino program, seen from the inside: pin 13 switches between 5 V and 0 V, and that turns the LED on and off.

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Lab 00Blink: your first program
Isometric drawing of a blue Arduino UNO connected with two wires to a breadboard with a red LED and a 220 Ω resistor.
Loads when you tap it, 334 KB
Lab 00. Turning on an LED means putting 5 V on a pin.
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What you will see

An UNO, a breadboard, a red LED and a 220 Ω resistor. The parts place themselves and the wires get connected from code.

With 5 V on the pin and about a 2.0 V drop across the LED, (5 - 2.0) / 220 = 13.6 mA flows through the resistor.

Model note

What the lab assumes and where its numbers come from.

Model: pin 13 at 5 V (HIGH) or 0 V (LOW), red LED with a typical 2.0 V drop and a 220 Ω resistor: (5 - 2.0) / 220 = 13.6 mA. Base template from KAPRI LAB.

On the roadmap

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Lab 00