# data[].attributes.body
Sensor de passagens:
Assim que passar um objeto ou ser humano em frente do sensor este conta as passagens.

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-Arduino
-Sensor ultrassônico
-Painel lcd 16x2
-Potenciômetro 10k
-Buzzer
-Breadboard
-Fios
-2 resistências 220 Ω
Importante:
-Paciência

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-Fotografar ciruito a ser feito
-Colar no word

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Arduino:
https://www.arduino.cc/en/software
https://blog.eletrogate.com/o-que-e-arduino-para-que-serve-vantagens-e-como-utilizar/
Lcd:
https://pt.wikipedia.org/wiki/LCD
https://www.arduino.cc/en/Reference/LiquidCrystal
https://www.arduino.cc/en/Reference/LiquidCrystalBegin
https://www.arduino.cc/en/Reference/LiquidCrystalSetCursor
https://www.arduino.cc/en/Reference/LiquidCrystalPrint
Sensor ultrassônico:
https://create.arduino.cc/projecthub/abdularbi17/ultrasonic-sensor-hc-sr04-with-arduino-tutorial-327ff6
https://create.arduino.cc/projecthub/Isaac100/getting-started-with-the-hc-sr04-ultrasonic-sensor-036380
https://randomnerdtutorials.com/complete-guide-for-ultrasonic-sensor-hc-sr04/
https://www.mecanicaindustrial.com.br/598-o-que-e-um-sensor-ultrassonico/
(nota usar

cm = (duration*.0343)/2;

ou

 cm = (duration/2) / 29.1;

é igual)
Buzzer:
https://create.arduino.cc/projecthub/SURYATEJA/use-a-buzzer-module-piezo-speaker-using-arduino-uno-89df45
https://translate.google.com/translate?sl=auto&tl=pt&u=https://en.wikipedia.org/wiki/Buzzer
https://en.m.wikipedia.org/wiki/Piezoelectric_speaker
Breadbord:
http://designbuildcode.weebly.com/breadboard-circuits.html

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Primeira Iteração (variavéis em ingles)

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Segunda Iteração (variavéis em portugês)