Once the gear is assembled, turn it to check that it moves smoothly and insert the motor. Press each of the motor's wires on the ends of a AA battery to check if the gear moves. (At this point, the battery’s polarity does not matter.)
Assembling the Electronics Section
Wire the electronics section that controls the robot’s movements.
(If there are any alternative components, please leave a comment and let us know!)
Solder pins headers to the Trinket, motor driver and regulator boards.
For the Trinket, you do not need to solder A6, A7 and the FTDI Header.
Also solder two pins to the wires of the motor and battery holder, to make it easier to connect to the breadboard.
Inserting the pins to the breadboard and placing the board on top will make it more stable to solder the pins.
※ Too much heat can damage the chip on the board. Let the board cool down every 5 seconds you solder.
Wire the Components
Break off both ends of the bread board so that it will fit in the case. Be careful of the direction of the components. Refer to the previous pictures and pin names printed on the bottom of the board
Connect the motor afterwards.
・Since the standard ArduinoIDE does not recognize Trinket, download Arduino 1.6.x IDE
・Open the IDE
・From the menu at the top of the screen, select [Tools] → [Board] and select Pro Trinket 3V/12MHz(USB)
・Do not select the Serial Port
Upload the sketch (2)
・Open this sketch program ・From [Tools] → [Programmer] select USBtinyISP ・Connect the Trinket to the PC with a USB2.0 A-miniB Cable. ・While the red LED is blinking, press the upload button at the top left of the window (the button with a right arrow).
Memo: If There Are Errors When Uploading
avrdude: Error: Could not find USBtiny device (0x1781/0xc9f)
When this error appears, eject and insert the USB cable and upload the sketch while the red LED is blinking. Or try using the USB 2.0 Cable.
Attach the Battery Holder
Attach the Battery holder next to the gearbox with both sided tape.
If the motor’s wires are too short, put it through the hole as shown in the picture.
Attach the Breadboard to the Gearbox
From the yellow plastic part, cut off two of the the smaller cylinders with a nipper.
Attach the breadboard with thick both sided tape. Since the head of the screw gets in the way, using thick tape will make it easier to attach the breadboard.
Referring to the image above and the Mechanical Giraffe’s instructions (No. 7, 8, 9), assemble the laser cutter pieces with the Mechanical Giraffe’s pieces.
Be careful of the direction and order of the pieces
Attach the Pieces to the Gearbox (2)
The grey pieces (A8) may be hard to insert through the hole, so use a plier.
If A8 does not fit, use a M3 screw and nut instead.
Check Its Movement
Insert Two AA batteries into the battery holder and check the Fabwalker’s movement. (At this point it won't be able to walk.)
Chargeable lithium ion batteries such as eneloop are stable since they do not have voltage drops.
Supply 3V with two batteries.
Gather Materials for the Robot’s Feet
Gather Material for the Robot’s Feet, such as branches of a tree, flowers and grass.
Or you can use household items such as pens and tooth brushes.