Me yasa ake amfani da resistors tare da maɓallan turawa da switches tare da Arduino

Me yasa ake amfani da resistors tare da maɓallan turawa da switches tare da Arduino

• Maɓallin kunnawa/kashewa mai sauƙi don LED
• Mai sarrafa wasan motsa jiki mai mu'amala
• Remote control don kayan gida
• Tsarin tsaro tare da kunnawa ta maɓallin turawa

Bari mu bincika dalilan da ke bayan amfani da resistors a cikin waɗannan da'irori.

Kayan aiki/Abubuwan da ake buƙata

Abubuwan da ake buƙata don wannan aikin ba su da yawa: allo na Arduino, maɓallin turawa, da resistor (fiye da 300 ohms). Ƙimar resistor ba ta da muhimmanci; ƙimomi kamar 1kΩ, 10kΩ, ko ma 100kΩ za su yi aiki da kyau gabaɗaya (a cikin bidiyo a 00:41).

Jagorar Haɗin Waya

Akwai manyan hanyoyin haɗin waya guda biyu (a cikin bidiyo a 00:30):

1. Tsari na 1: Haɗa maɓallin turawa tsakanin fil ɗin Arduino da +5V. Ɗayan gefen maɓallin turawa an haɗa shi zuwa ƙasa ta hanyar resistor. Lokacin da aka danna maɓallin, fil ɗin yana karanta HIGH; lokacin da aka sake shi, yana karanta LOW.
2. Tsari na 2: Haɗa maɓallin turawa tsakanin fil ɗin Arduino da ƙasa. Ɗayan gefen maɓallin turawa an haɗa shi zuwa +5V ta hanyar resistor. Lokacin da aka danna maɓallin, fil ɗin yana karanta LOW; lokacin da aka sake shi, yana karanta HIGH.

Zane na haɗin waya na gani zai zama da amfani a nan.

Bayanin Lambar

Lambar Arduino tana amfani da aikin pinMode() don saita fil ɗin a matsayin shigarwa. Babban abu shine amfani da INPUT_PULLUP (a cikin bidiyo a 04:06, 04:23). Wannan resistor na ciki na pull-up yana kawar da buƙatar resistor na waje a wasu tsare-tsare, yana sauƙaƙa haɗin waya. Aikin digitalRead() yana karanta yanayin fil ɗin, kuma bayanin if-else mai sauƙi yana tantance ko an danna maɓallin (LOW) ko ba a danna shi ba (HIGH) (a cikin bidiyo a 08:34).

pinMode(2, INPUT_PULLUP); // Yana saita fil 2 a matsayin shigarwa tare da resistor na ciki na pull-up
int pushButton = digitalRead(2); // Yana karanta yanayin fil 2
if (pushButton == LOW) {
  // An danna maɓallin
} else {
  // Ba a danna maɓallin ba
}

Aikin Kai Tsaye/Nunawa

Bidiyon yana nuna duka tsare-tsaren haɗin waya da halayensu. Yana nuna matsalolin da zasu iya tasowa idan ba a yi amfani da resistor ba, kamar karatun da ba daidai ba saboda hayaniya da haɗin capacitive (a cikin bidiyo a 06:18, 06:39, 07:21). Nunin yana nuna a sarari ingantaccen aiki mai kwanciyar hankali da aka samu tare da resistor a wurin (a cikin bidiyo a 08:08).

Babuka

• [00:00] Gabatarwa
• [00:30] Tsare-tsaren Haɗin Waya
• [04:12] Bayanin Lambar ta amfani da INPUT_PULLUP
• [05:36] Cire Resistor: Nunawa Aiki
• [08:33] Bayanin Lambar

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/*
 * This is an Arduino Sketch for a tutorial video 
 * explaining why a resistor is needed to be used with a push button
 * with Arduino.
 * 
 * Written by Ahmad Shamshiri on July 17, 2018 at 23:11 in Ajax, Ontario, Canada
 * For Robojax.com
 * Watch the instruction video for this code: https://youtu.be/TTqoKcpIWkQ
 * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.
 */

void setup() {
  // Robojax.com push button tutorial
  pinMode(3,INPUT_PULLUP);
  Serial.begin(9600);
  Serial.println("Robojax Push Button Tutorial");
  

}

void loop() {
  // Robojax.com push button tutorial
  int pushButton = digitalRead(3);
  if(pushButton == LOW)
  {
    Serial.println("Pin 3 LOW");
  }else{
    Serial.println("Pin 3 HIGH");
  }

delay(500);
}

/*
 * This is an Arduino Sketch for a Tutorial video 
 * explaining why a resistor is needed to be used with a push button
 * with an Arduino to connect the pin to Ground (GND)
 * 
 * Written by Ahmad Shamshiri on July 18, 2018 at 17:36 in Ajax, Ontario, Canada
 * For Robojax.com
 * Watch the instruction video for this code: https://youtu.be/TTqoKcpIWkQ
 * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.
 */

void setup() {
  // Robojax.com push button tutorial
  pinMode(2,INPUT_PULLUP);
  Serial.begin(9600);
  Serial.println("Robojax Push Button Tutorial");
  

}

void loop() {
  // Robojax.com push button tutorial
  int pushButton = digitalRead(2);
  if(pushButton == LOW)
  {
    Serial.println("Button is pushed.");
  }else{
    Serial.println("Button is NOT pushed.");    
  }

delay(500);
}