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lights

my first led turns on

led's games

an electronic dice

traffic lights

candle effect

fading effect

red-green-blue 1

red-green-blue 2

7-segment display - Countdown

7-segment display bis

sensors

sensors

Sensor and serial port

sensor PIR

ultrasonic sensor

sound

Theremin

a melody

build a note

switches

buttons

keypad

input via serial port

input via serial port 2

input remote control

input remote control 2

use of variables

custom functions

servos

a robot

a remote-controlled robot

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pins

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resistors

remarkable sketches

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Arduino pins

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tables

colour's tables

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Theremino

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costruiamo_una_nota

introduction

If you play the note A on a guitar, the string makes 440 vibrations in a second
between a vibration and the other spends time:
1/440 = 0.0022727273 seconds
that is 2272 microseconds (millionths of a second)
divide this time by 2
2272/2 = 1136

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