Introduction

The bionic robot hand is made up of acrylic material. It consists of 5 micro metal servos, joints and one hand base. The special mechanical structure makes every finger can be controlled separately, all can move in certain range. And every finger has spring damping structure, it will protect the robotic hand from the mechanical stress effectively. With 24 channel Veyron servo driver, all actions can be controlled via PC software, supporting online debug and wireless control. The bionic robot hand can be controlled by Arduino and other Servo controllers. It can grab 500g object, and it is the best option for DIY robot hand demonstration. The servo can be connected directly to the arduino IO expansion shield or the Romeo robot microcontroller, and arduino servo library makes it easier to use.

warning_yellow.png Note: Please be careful with the servo control, even if there is damping structures on each finger, the non-standard operation will still damage the servos.

Specification

Tutorial

In this tutorial, we'll demonstrate a simple way to control the robot hand.

Requirements

Connection Diagram

Bionic Robot Hand Arduino Connection

Sample Code

/*!
   @file ROB0142.ino
   @brief Bionic Robot Hand
   @n [Get the module here]()
   @n This example show 0-9 the 10 Numbers.
   @n [Connection and Diagram]()

   @copyright  [DFRobot](http://www.dfrobot.com), 2017
   @copyright GNU Lesser General Public License

   @author: (ju.li@dfrobot.com)
   @version  V1.0
   @date  2017-03-01
*/

#include <Servo.h>

Servo Saservo;
Servo Sbservo;
Servo Scservo;
Servo Sdservo;
Servo Seservo;

int Sa = 90;  // default Position
int Sb = 50;  //
int Sc = 40;  //
int Sd = 50;  //
int Se = 50;  //


void setup()
{
  Serial.begin(9600);  //Serial Baudrate
  Saservo.attach(8);   //thumb servo
  Sbservo.attach(9);   //little finger servo
  Scservo.attach(10);  //ring finger servo
  Sdservo.attach(11);  //middle finger servo
  Seservo.attach(12);  //index finger servo

  Saservo.write(90);   //thumb
  Sbservo.write(50);   //little finger
  Scservo.write(40);   //ring finger
  Sdservo.write(50);   //middle finger
  Seservo.write(50);   //index finger
  delay(1000);
}

void loop()
{
  char cc;  //
  while (Serial.available() > 0)  //
  {

    cc = Serial.read();  //
    if (cc == 'a')  //
    {
      // spread the fingers
      for (Sa = 90; Sa <= 160; Sa += 1) //thumb
      {
        Saservo.write(Sa);
        delay(15);
      }

      for (Sb = 50; Sb <= 150; Sb += 1) //little finger
      {
        Sbservo.write(Sb);
        delay(15);
      }

      for (Sc = 40; Sc <= 130; Sc += 1) //ring finger
      {
        Scservo.write(Sc);
        delay(15);
      }

      for (Sd = 50; Sd <= 150; Sd += 1) //middle finger
      {
        Sdservo.write(Sd);
        delay(15);
      }

      for (Se = 50; Se <= 140; Se += 1) //index finger
      {
        Seservo.write(Se);
        delay(15);
      }
      delay(1000);

      //close the fingers
      for (Sa = 160; Sa >= 90; Sa -= 1)
      {
        Saservo.write(Sa);
        delay(15);
      }

      for (Sb = 150; Sb >= 50; Sb -= 1)
      {
        Sbservo.write(Sb);
        delay(15);
      }

      for (Sc = 130; Sc >= 40; Sc -= 1)
      {
        Scservo.write(Sc);
        delay(15);
      }

      for (Sd = 150; Sd >= 50; Sd -= 1)
      {
        Sdservo.write(Sd);
        delay(15);
      }

      for (Se = 140; Se >= 50; Se -= 1)
      {
        Seservo.write(Se);
        delay(15);
      }

    }
    //9
    if (cc == '9')
    {
      Saservo.write(90);//thumb
      Sbservo.write(50);//little finger
      Scservo.write(40);//ring finger
      Sdservo.write(50);//middle finger
      Seservo.write(110);//index finger
    }


    //8
    if (cc == '8')
    {
      Saservo.write(160);//thumb
      Sbservo.write(50);//little finger
      Scservo.write(40);//ring finger
      Sdservo.write(50);//middle finger
      Seservo.write(140);//index finger
    }


    //7
    if (cc == '7')
    {
      Saservo.write(160);//thumb
      Sbservo.write(50);//little finger
      Scservo.write(40);//ring finger
      Sdservo.write(150);//middle finger
      Seservo.write(140);//index finger
    }


    //6
    if (cc == '6')
    {
      Saservo.write(160);//thumb
      Sbservo.write(150);//little finger
      Scservo.write(40);//ring finger
      Sdservo.write(50);//middle finger
      Seservo.write(50);//index finger
    }


    //5
    if (cc == '5')
    {
      Saservo.write(160);//thumb
      Sbservo.write(150);//little finger
      Scservo.write(130);//ring finger
      Sdservo.write(150);//middle finger
      Seservo.write(140);//index finger
    }


    //4
    if (cc == '4')
    {
      Saservo.write(90);//thumb
      Sbservo.write(150);//little finger
      Scservo.write(130);//ring finger
      Sdservo.write(150);//middle finger
      Seservo.write(140);//index finger
    }


    //3
    if (cc == '3')
    {
      Saservo.write(90);//thumb
      Sbservo.write(50);//little finger
      Scservo.write(130);//ring finger
      Sdservo.write(150);//middle finger
      Seservo.write(140);//index finger
    }


    //2
    if (cc == '2')
    {
      Saservo.write(90);//thumb
      Sbservo.write(50);//little finger
      Scservo.write(40);//ring finger
      Sdservo.write(150);//middle finger
      Seservo.write(140);//index finger
    }


    //1
    if (cc == '1')
    {
      Saservo.write(90);//thumb
      Sbservo.write(50);//little finger
      Scservo.write(40);//ring finger
      Sdservo.write(50);//middle finger
      Seservo.write(140);//index finger
    }


    //0
    if (cc == '0')
    {
      Saservo.write(90);//thumb
      Sbservo.write(50);//little finger
      Scservo.write(40);//ring finger
      Sdservo.write(50);//middle finger
      Seservo.write(50);//index finger
    }

  }
}

Expected Results

After downloading the sample code, you can enter following characters to control the hand action:

FAQ

For any questions, advice or cool ideas to share, please visit the DFRobot Forum.

DFshopping_car1.png Get [link Bionic Robot Hand (Left)] & [link Bionic Robot Hand (Right)] from DFRobot Store or DFRobot Distributor.