Assembly guide
So you want to build your own Phogo robot? Here is how!
First you need to get the following parts:
- 3D-printed Phogo robot chassis (STL, right-click->save as)
- 3D-printed pen holder (STL, right-click->save as)
- 3D-printed pair of wheels (STL, right-click->save as), and rubber tire (O-ring, get them here, ~$1 both)
- Ultrasound distance sensor (HC-SR04 or similar, get it here) ~$3
- Gyroscope module (MPU6050, get it here) ~$3
- "bq ZUM" or "bq ZUM core" controller board (Arduino with bluetooth and 3Amp power supply) (get it here) ~$40
- Screws, nuts and spacers to hold the controller board ~$1
- Battery and connector cable (get it here) ~$2
- Mini servo motor for the pen-lift mechanism (HD-1160A or similar, get it here) ~$9
- Two continuous-rotation servo motors (SM-S4303R or similar, get them here) ~$9 each
- Zip-ties ~$1
- Dry-wipe marker pen (approx 16-17mm thick) ~$3
The total estimated build cost is $81 per robot (excluding 3D-printer material).
Two big nuts are used as spacers. You could use small pieces of tube instead.
Technical details: The gyroscope module is powered through the analog pins, they are set-up as digital outputs, one of them to 5V and the other to 0V (GND). It is possible because the module needs very little power. This is done only to save space and simplify assembly.
Important: Make sure the colors match what you see in the picture.
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- Pen-up servo motor
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- Right servo motor
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- Left servo motor
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- Ultrasound GND
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- Ultrasound GND
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- Ultrasound +5V
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- Ultrasound TRIGGER
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- Ultrasound ECHO
Tidy-up the cables with some tape. Remember that a tidy robot will be more fun to play with :-)
Important: Do not tighten the screws too much, if you do, the wheel will be difficult to turn and the robot will not be able to walk properly.
Important: Do not turn-on the robot yet. We will need to program it first by connecting it to a computer. We will do this in How to use a Phogo robot?.
Fun times ahead! Continue to How to use a Phogo robot?
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