How to use Flex Sensor to Control number of turns of Servo?

Projects General Guidance
1

Hello everyone, I wanna ask if how can I control the number of turns of a Servo using the flex sensor as a controller or input?

For example, if I have flex sensor varies from 25k-75k ohm and i wanna program this in this way.

if flexed the sensor to the max position and the servo must turn thrice or 3 turns and if a flexed to the half and the servo must give 1.5 turns, and if normal it will be back to the normal position which is zero degree.

Thank You,

2

Most servos only move through about 130-180 degrees. What servo are you using that will give you multiple turns?

Steve

3

the servo must turn thrice or 3 turns

"thrice" means three times.

Is this a winch servo?

4

Didn't know flex sensors can be twisted that much themselves.

Sounds more like a job for an encoder of sorts.

5 
#include <Servo.h>


Servo Winch;


// servo.writeMicroseconds() constants for position of a 10-turn winch servo:
const int StartPosition = 1000;
const int TenTurns = 2000;
const int ThreeTurns = (((TenTurns - StartPosition) * 3) / 10) + StartPosition;


const byte WinchServoPin = 2;
const byte FlexSensorPin = A0;


const int FlexSensorMin = 0;  // DETERMINE BY EXPERIMENT
const int FlexSensorMax = 512;  // DETERMINE BY EXPERIMENT


void setup() {
  Winch.attach(WinchServoPin);
}


void loop() {
  Winch.writeMicroseconds(
    map(analogRead(FlexSensorPin), FlexSensorMin, FlexSensorMax, StartPosition, ThreeTurns));
}