Bill of Materials

We use in the project the components

We make some introduction about it.

• Controller Arduino Nano R3.x  (992-ARD-NANO30NP) or any Arduino Nano R3.x compatible. 
  

• Servo SG90 9g Tower Pro. You can use any type of Servo. Please pay attention that some servos can have other control pulse parameters.

• Magnetic Button Clasp Snaps
  18mm (3/4-inch) size Magnetic Button Clasp Snaps
  
  

• Breadboard.We used plastic cutting board, but any flat surface can be used.

• Scale weight sensors 10 kG (or other)
  

Schematics consists of two parts - 12-servo controller  and differential dynamometer. For connection can be used USB or BT interface.

We use the simplest analogue servo. You can use any kind of servos.  The bases, lever arms are shown in a figure:

We took plastic breadboard and install 6 blocks on it, for example it is left hand drawing, L – for the right hand.

The size of components are defined by the servo in use. We made all drawings for Servo mini SG90 9g Tower Pro. Here is one block

We use 3/4-inch size Magnetic Button Clasp Snaps. It is screwed with two node lever arms so it can be rotated.

Here You can see the breadboard with installed blocks and fully assembled

Program code is Arduino IDE compatible. You can download code from git hab  https://github.com/DrOnkel/ReHabJr  or Hackaday project file section.

BuildInstruction2.pdf   This instruction

DifDinLCD.ino    Arduino code for Diffirential Dynamometer controller

Dinamometr_Schematics.jpg  Add files via upload      6 days ago

ServoMotorsSchematics.jpg   Add files via upload      6 days ago

ServoRehab01.ino        Arduino code for servo controller, USB control version

ServoRehab_i_06.ino   Arduino code for servo controller, BT control version

Download the program to Your Arduino Nano using Arduino IDE. You can download it from arduino.cc .

The movement is defined by arrays MassX[8][2]. It contains 8 main points of finger base path. The movement between main points is calculated using linear interpolation. The full review of program code is in Program instruction.

We construct 3d box for 3d printer. The box is bigger than 3d printer base and we devide the component by 2 or 3 parts. Here is 4 side parts of box

Here is top deck, we connect it to the sides of the box

We hold the parts together. We use plastic DIN- rail (1)  and magne holders (2)

Part 2 contains magnet for attaching hand holder with magnets too

We install this plate with magnets into han holder