#include <Servo.h> 
Servo BLDC; 

void setup() {
BLDC.attach(8); 
BLDC.writeMicroseconds(1200); //initial speed
Serial.begin(9600);
}

void loop() {
int val; 
val= analogRead(A0); 
val= map(val, 0, 1023,1000,1500);
Serial.println(val) ; 
BLDC.writeMicroseconds(val); // signal to BLDC
}