Pictures

These pictures are from Baidu Search.

Picture 1: Installment

Picture 2: Appearance

Picture 3: Encoder of Motor

Picture 4: Pins location and number

Physical Specification

Brand: Mabuchi Motor (万宝至电机)
Type: RS-365PW 16120
Body length：37.5mm
Body diameter：27.6mm（Magnetic Ring Diameter 29mm）
Axis Length： 12mm or 9.4mm
Axis diameter：2.3mm
Weight： 65.3g or 64.7g
Voltage range: DC 6-12V
Idling current：80mA
No load speed：3200-6700 rpm

Electrical Specification

Test result from Arduino with running motor.

The encoder wheel one around gets 334 counts from phrase A.
The motor running direction is Clockwise if A pulse is falling edge and B phrase is high level.
The motor running direction is counterclockwise if A pulse is falling edge and B phrase is low level.

Arduino Test Code

#include <MsTimer2.h>

const int pinA = 2;//This is a digital pin.
const int pinB = 3;//This is a digital pin.
const int maxTick = 334;

bool isClockwise = true;
int tickCounter = 0;

void setup() {
  pinMode(pinA, INPUT); //the A pin of motor
  pinMode(pinB, INPUT); //the B pin of motor
  
  // Set baud rate is 9600bit/s：
  Serial.begin(9600);

  //checking A pulse if falling edge, if it is, go to CountPinA.
  attachInterrupt(digitalPinToInterrupt(pinA), CountPinA, FALLING);//The attachInterrupt function Only support 2,3 pin on the Arduino Nano board.
  

  //invoking flash once a second.
  MsTimer2::set(1000, flash);   //it's been interrupted by every second.
  MsTimer2::start();   //start timer
}

void CountPinA()
{
    if(digitalRead(pinB)==HIGH)
    {
      isClockwise = true;
    }
    else
    {
      isClockwise = false;
    }

    tickCounter++;
    if(tickCounter > maxTick)
    {
      tickCounter = 0;
    }
}

void flash()
{
   //Here, 'Serial.read' is unusable.
  
   if(isClockwise == true)
   {
    Serial.print("clockwise,");
   }
   else
   {
    Serial.print("counter clockwise,");
   }

   Serial.print("tickCounter = ");
   Serial.println(tickCounter);
}//end funCounterA



void loop() {
  //'Serial.read' is unusable, May be here needing a delay.
}