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BrainCo STEM Kit Assembly Instructions Manual

Prosthetic hand
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BrainCo STEM Kit
Assembly
Instructions
1

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Summary of Contents for BrainCo STEM Kit

  • Page 1 BrainCo STEM Kit Assembly Instructions...

  • Page 2: Parts List

    Item Number Control box plates Servo board Parts List Screws 20(+2) Front wrist Back wrist Front Palm Back Palm Wire Plate Red finger hinges Finger pieces IR remote IR sensor Jumper wires Microcontroller 9V battery Servo motors Fishing wires Breadboard...
  • Page 3 Section 1: Building the Hand...
  • Page 4 The finger pieces are grouped according to their markings on the top. For example, all parts for the index finger have “2” marked on the parts.
  • Page 6 Insert a fishing wire in the thumb starting from the bottom, and follow the green arrows. Pull both wires on the bottom and make sure they have the same length.
  • Page 8 Insert a fishing wire in the index finger starting from the bottom, and follow the green arrows. Pull both wires on the bottom and make sure they have the same length.
  • Page 10 Insert a fishing wire in the middle finger starting from the bottom, and follow the green arrows. Pull both wires on the bottom and make sure they have the same length.
  • Page 12 Insert a fishing wire in the ring finger starting from the bottom, and follow the green arrows. Pull both wires on the bottom and make sure they have the same length.
  • Page 14 Insert a fishing wire in the little finger, following the green arrows. Pull both wires on the bottom and make sure they have the same length.
  • Page 15 Take 3 servos and place them in the bottom 3 slots of the servo board. Make sure all wires go through the slots first.
  • Page 16 Tighten all 6 screws.
  • Page 17 From below, place 2 remaining servos in the top 2 slots from the bottom.
  • Page 18 Place 4 screws from below and tighten them.
  • Page 19 The finished servo board with 5 servos are shown as follows. Top view Bottom view...
  • Page 20 Assemble the front palm and front wrist.
  • Page 21 Tighten all 3 screws.
  • Page 22 Assemble the servo board onto the front wrist and tighten all 4 screws.
  • Page 23 Attach the clear acrylic board on the bottom of the hand assembly. Notice its orientation. Make sure all the servo wires pass through the cutout on the acrylic board.
  • Page 24 Section 2: Building the Control Box...
  • Page 25 Orientate the bread board as shown in the picture. Use jumper wires to connect the bottom pin of the 4 column to the GND pin on the microcontroller. Then connect the bottom pin of the column to the 5V pin on microcontroller.
  • Page 26 Use a jumper wire, connect the lower half of the 4 column to the upper part, by inserting both ends into the holes indicated in the graph. Then repeat the same procedure for the 7 column.
  • Page 27 Servos are numbered from 1 to 5 from right to left. These numbers will be referenced in circuit assembly Servo2- Index Finger Servo1- Thumb procedure. Each servo cable is composed with group of 3 wires: a brown wire, a red wire and an orange wire. Servo4- Ring Finger Servo5- Little Finger Servo3- middle Finger...
  • Page 28 （1）Find the brown wire of servo1 and use a jumper wire to connect it to the bread board hole indicated in the picture. （2）Find the red wire of servo1 and use another jumper wire to connect it to the bread board hole indicated in the picture.
  • Page 29 Find the orange wire of servo1 and use a jumper wire to connect it to pin 5 on the microcontroller.
  • Page 30 Using the same method, Connect Servo 2...
  • Page 31 Using the same method, Connect Servo 3...
  • Page 32 Using the same method, Connect Servo 4...
  • Page 33 Using the same method, Connect Servo 5...
  • Page 34 Insert 3 pins of the IR sensor into the holes on the bread board, indicated in the picture. Make sure the rounded side of the IR sensor is facing yourself.
  • Page 35 Double check the connections of pin A, B and C from last step. Then use 3 jumper wires to connect highlighted pins on the bread board to pin 13, 3.3V and GND on microcontroller.
  • Page 36 Connect the 9V battery as shown to the battery clip.
  • Page 37 Plug the power connector into the microcontroller.
  • Page 38 Finished control box...
  • Page 39 Section 3: Connecting the fishing wires...
  • Page 40 Turn on the control box and make sure the microcontroller is lighted up. While it’s on, place white servo arms on all the servos, pointing straight up. Then use screw to secure them.
  • Page 41 Finished servo board. You can now turn off the control box.
  • Page 42 Insert the thumb assembly all the way into the slot on the palm.
  • Page 43 Insert 2 fishing wires into the hole indicated.
  • Page 44 Place the index finger (2), middle finger(3), ring finger(4) and little finger(5) near the palm assembly. Insert fishing wires into the holes indicated.
  • Page 45 Place all 4 fingers on the slots indicated. Then assemble the wire plate.
  • Page 46 Make sure it fits into the slots on the side.
  • Page 47 Let all the fishing wires go through the corresponding holes on the wire plate, as indicated in the picture.
  • Page 48 Place the back palm and tighten all 8 screws.
  • Page 49 With the wires passed through the holes, insert one wire into the top hole on the white servo arm, and the other wire into the second hole. Do the same for all 10 wires. Then tight 2 knots and cut excessive wires.
  • Page 50 Place the back wrist and tighten 2 screws.
  • Page 51 Assemble the hand assembly with the control box. The prosthetic hand is finished!