Arduino Uno Code as BLDC Motor Controller with MOSFET IRF540N and IC IR2101

Using Arduino Programming Questions
1

Hello everyone so i finally make my custom controller for BLDC Motor working using MOSFET IRF540N as power circuit and IC IR2101 as switching device controlled by Arduino UNO. The thing is when i power it on, my BLDC start moving automatically before i even use my throttle. I suspect this is something wrong with my code, can someone help me? here's my code.

const int HallApin = 7;
const int HallBpin = 6;
const int HallCpin = 5;

const int potPin = A0;

int HallAState = 0;
int HallBState = 0;
int HallCState = 0;

const int D2pin = 2;
const int D3pin = 3;
const int D4pin = 4;
const int D9pin = 9;
const int D10pin = 10;
const int D11pin = 11;

int Kecepatan;

void setup() {
  pinMode (HallApin, INPUT);
  pinMode (HallBpin, INPUT);
  pinMode (HallCpin, INPUT);

  pinMode (potPin, INPUT);

  pinMode (D2pin, OUTPUT);
  pinMode (D3pin, OUTPUT);
  pinMode (D4pin, OUTPUT);
  pinMode (D9pin, OUTPUT);//pwm
  pinMode (D10pin, OUTPUT);//pwm
  pinMode (D11pin, OUTPUT);//pwm
  Serial.begin(115200);

}

void loop() {
  Kecepatan = analogRead(potPin);
  Kecepatan = map(Kecepatan, 0, 1023, 0, 255);
  HallAState = digitalRead(HallApin);
  HallBState = digitalRead(HallBpin);
  HallCState = digitalRead(HallCpin);
  if (HallAState == HIGH && HallBState == LOW && HallCState == HIGH) {
    digitalWrite(D2pin, LOW);
    digitalWrite(D3pin, HIGH);
    digitalWrite(D4pin, LOW);
    analogWrite(D9pin, Kecepatan);
    digitalWrite(D10pin, LOW);
    digitalWrite(D11pin, LOW);
  }
  else if (HallAState == HIGH && HallBState == LOW && HallCState == LOW) {
    digitalWrite(D2pin, LOW);
    digitalWrite(D3pin, LOW);
    digitalWrite(D4pin, HIGH);
    analogWrite(D9pin, Kecepatan);
    digitalWrite(D10pin, LOW);
    digitalWrite(D11pin, LOW);
  }
   else if (HallAState == HIGH && HallBState == HIGH && HallCState == LOW) {
    digitalWrite(D2pin, LOW);
    digitalWrite(D3pin, LOW);
    digitalWrite(D4pin, HIGH);
    digitalWrite(D9pin, LOW);
    analogWrite(D10pin, Kecepatan);
    digitalWrite(D11pin, LOW);
  }
   else if (HallAState == LOW && HallBState == HIGH && HallCState == LOW) {
    digitalWrite(D2pin, HIGH);
    digitalWrite(D3pin, LOW);
    digitalWrite(D4pin, LOW);
    digitalWrite(D9pin, LOW);
    analogWrite(D10pin, Kecepatan);
    digitalWrite(D11pin, LOW);
  }
  else if (HallAState == LOW && HallBState == HIGH && HallCState == HIGH) {
    digitalWrite(D2pin, HIGH);
    digitalWrite(D3pin, LOW);
    digitalWrite(D4pin, LOW);
    digitalWrite(D9pin, LOW);
    digitalWrite(D10pin, LOW);
    analogWrite(D11pin, Kecepatan);
  }
  else if (HallAState == LOW && HallBState == LOW && HallCState == HIGH) {
    digitalWrite(D2pin, LOW);
    digitalWrite(D3pin, HIGH);
    digitalWrite(D4pin, LOW);
    digitalWrite(D9pin, LOW);
    digitalWrite(D10pin, LOW);
    analogWrite(D11pin, Kecepatan);
  }

};

Note: "Kecepatan" variable is "Speed" variable i used in this code.
Thanks!

2

how did you wire the HallA HallB and HallC thingy ?

4

directly from my BLDC Motor to Arduino UNO's output pin number 7,6 and 5

5

even if you connect them proper it would not work.

6

i did power it on and my BLDC Motor started to rotating automatically, so does that mean my Arduino UNO has nothing to do with it?

7

Is the pot set to 0?

These pin names are meaningless. What are the six pins connected to?

8

yes because it's a hand throttle it goes back to 0 when i'm not use it.

those pins are connected from Arduino UNO as High output 2,3,4 and Low output 9,10,11 to IC IR2101.

9

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