Instructions

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Lesson 6: Key-controlled LED

I/O-Port is an interface, which can be used as input and output. So far,

we've only used it as the output. In this experiment we will try to use the

input to read the output value of the connected device. We will use a key

as input and a LED as output to get a better understanding of the I/O

functions.Key switches, which many people probably know, have a

switching value (digital value). When the switch is pressed, the circuit

closes and is in a conducting state.

For this we need:

Mega2560 board

USB cable

Red M5 LED

220 Ω resistor

10 kΩ resistor

Key switch

Breadboard

Jumper cable