arduino, eletrônica, robotica...

Preciso de ajuda para entender o funcionamento do sensor DHT11, por favor.

Bem, utilizei os seguintes materiais:
placa arduino UNO
sensor DHT11
Resistor 10Kohms
Jumpers

Usei mais ou menos esse esquema:

Lendo o datasheet percebi que no circuito existem duas fontes de entrada, compreendo que cada fileira conecta por um jumper a uma fileira conectada à saída 5V da placa é considerada uma fonte independente uma da outra. E, não tenho certeza, o sensor é alimentada por uma tensão de 3.3-5V.
Para que serve o resistor? Ele deve limitar a tensão que entra no pino de dados? Então a corrente elétrica passa pelo resistor entra no pino digital, passa pelos "processadores" do sensor e volta indo em direção à entrada analógica da placa?
Um fonte de alimentação serve para fornecer energia para os componentes que interpretam a temperatura (processadores internos do sensor) e a outra fonte serve para fornecer a corrente elétrica que vai sofrer interferência a depender da temperatura (essa interferência é a variação do valor de resistência em função da temperatura que é apresnetado por algum dispositivo dentor do sensor)?

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Permalink Responder até Juliano Balcante Pereira em 23 setembro 2015 at 18:55

link para imagem do modelo que segui
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

▶ Responder

Permalink Responder até José Gustavo Abreu Murta em 23 setembro 2015 at 22:19

Podia ter enviado o link do data sheet...

http://robocraft.ru/files/datasheet/DHT11.pdf

Tensão de alimentação do sensor DHT11 pode ser 3,3v ou 5,0V.

O resistor serve para polarizar a saída Coletor aberto.

A saída é digital e serial.

▶ Responder

Permalink Responder até Juliano Balcante Pereira em 24 setembro 2015 at 18:19

Boa tarde, José.
Desculpe pela falta do datasheet.

Ainda estou com umas dúvidas:
*O sensor tem alguns componentes internos que servem para interpretar o temperatura e enviar um valor fixo para a placa?
-Se sim, qual a fonte de alimentação desses componentes? É a energia que entra pelo pino 1 (Vcc)?
-Falando do pino 2 (de dados), ele funciona assim? A corrente elétrica entra no resistor -> é reduzida -> sai do resistor -> vai para o pino 2 -> tem o valor reduzido quando passa por um componente cuja resistência varia em função da temperatura -> sai pelo pino 2 -> entra na placa por uma porta digital.

▶ Responder

Permalink Responder até José Gustavo Abreu Murta em 24 setembro 2015 at 21:46

O sensor tem alguns componentes internos que servem para interpretar o temperatura e enviar um valor fixo para a placa? - Sim

-Se sim, qual a fonte de alimentação desses componentes? É a energia que entra pelo pino 1 (Vcc)?

- Sim

-Falando do pino 2 (de dados), ele funciona assim? A corrente elétrica entra no resistor -> é reduzida -> sai do resistor -> vai para o pino 2 -> tem o valor reduzido quando passa por um componente cuja resistência varia em função da temperatura -> sai pelo pino 2 -> entra na placa por uma porta digita

- Nada disso - tem um circuito que converte a umidade em um sinal digital.