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Toy implies interaction! But when I build LEGO® Track Bot it lacked of any interaction. At the time I built the LEGO Track Bot I was not thinking about the interaction part of it at all. So I decided to build another Track Bot that have more features than the Track Bot. And I could play or interact with it.  
And the result is R/C LEGO®"Dart Shooter Droid" that I am going to show you how to build one in this instructable. 

Dart Shooter Droid
Basically, this "Dart Shooter Droid" uses LEGO® components similar to the previous built LEGO® Track Bot, and "Dart Shooter Droid" uses the same vertical gearbox and base similar to Lego Track Bot. But I did some revision on the track to tighten them up a little more by replacing one of the hubs in triangular tracks with 24-tooth gears. By doing this the tracks move better than before.

This Droid is capable of rotating it torso to both left and right. The Droid has an arm equips with dart (or cannon) launcher., and capable to rotate the canon up and down to aim and shoot at some kind of target.

The Droid uses two of my Palm Arduinos,
- Palm Arduino II to control the upper part of the body.
- Palm Arduino V3 (LEGO® Compatible Arduino PCB) to control the tracks to move in any directions.
These two Arduinos are communicating with each other via I2C Communication protocol (See details Step 15).


The Target Bot
Along the way of building this "Dart Shooter Droid", I envisioned "through the looking glass" that I should create a game for the Droid. What if we have a target for the Dart Shooter to fire at.
I thought about line up a mini figures similar to the bowling pins. "But I don't have that many mini figures!" That doesn't work!

While I browsed through eBay - LEGO® Technic pages, I saw the 8233/8239 set. I liked the look of the creature that can shoot the dart back. And I have some components enough to build the similar creature. 

So I decided to built the Target Bot similar to the creature in 8233/8239 Lego set. The Target Bot did not used exactly the same components as in 8233/8239, I did altered some components and left off some components.
For the construction details and parts list of the Target Bot see Step 16.

WARNING: Please do not shoot the dart to anybody face or eyes. The dart shooter or cannon used in the project can shoot the dart as fas as eight to ten feet. 

Disclaimer:
LEGO®, TECHNIC, are property of The LEGO Group of Companies (http://www.lego.com), which does not sponsor, own, authorize or endorse this creation.

Step 1: Parts & Tools

In this project, I created a R/C LEGO® "Dart Shooter Droid" that combined the parts from components list below,

LEGO® Components
I divided LEGO® Components into four separate groups, Vertical Gearbox Support, Torso and Head, Left Arm, and Right Arm.
In addition I also provided the Instruction of the Target Bot. (Components for Target Bot, see Photo 5, are listed separately in Step 14.)
Following are components used in this project.

Torso and Head Components

1 no.   - Liftarm 1x9 Bent 7x3 (#32271)
6 nos. -  Liftarm 2x4 L shape (#32140)
4 nos. -  Liftarm 1x4 (#2825)
4 nos. -  Liftarm 1x11.5 Double Bent Thick (#32009)
2 nos. - Liftarm 3x5 L-Shape with Quarter Ellipse Thin (#32250)

4 nos. -  1/2 Bush (#32123)
2 nos. -  Bush for Cross Axle (#6590)
2 nos. -  Bush 1/2 Toothed Type II (#4265b)

1 no.   - Cross Axle 10M (#3737)
1 no.   - Cross Axle 8M (#3707)
5 nos. - Cross Axle 6M (#3706)
1 no.   - Cross Axle 5M (#32073)
3 nos. - Cross Axle 4M (#3705)
5 nos. - Cross Axle 2M with Groove(#32062)

2 nos. - Connector Peg (#3673)
3 nos. -  Connector with Peg 3M (#32556)
6 nos. -  Connector Peg/Cross Axle (#6562)
4 nos. -  Connector Peg with Friction (#2780)
2 nos. - Connector Peg with Knob  (#4274)

6 nos. - Axle Conn Perp 3L (#32184)
2 nos. -  Axle Connector Block 3 x 6 with 6 Axle holes (#32307)
1 no.   - Axle Joiner (#6538b)

2 nos. -  1x2 Technic Brick (#3700)

2 nos. - 2x4 Technic Plate (#3709)

1 no. - 2x2 Plate with Holes (#2817)

12 nos. - Technic Lever (#6632)

2 nos. - Round Plate 1x1 Transparent Green (#30057)
2 nos. -  Round Plate 1x1 Transparent Red (#30057)

1 no. - Angle Element [4], 135 Degrees (#32192)
2 nos. - Angle Element [1], 0 Degrees (#32013)

1 no. - Rigid Tube 3 mm Dia. 7L  (#75c07)
1 no. - Rigid Tube 3 mm Dia. 9L  (#75c09)

1 no. - Parabola Dish 2x2 (#4740)

2 nos. - Slant Brick (#2744)

1 no. - Slope 45 6x2 Invert Brick with Connector (#30390)

Vertical Gearbox Support & Base Components

4 nos.   -  Connector Peg with Friction 3M (#6558)
10 nos. -  Connector Peg/Cross Axle (#6562)

2 nos. - Connector Peg (#3673)
2 nos, -  1x16 Technic Brick (#3703)
3 nos. - 1x12 Technic Brick (#3895)
2 nos. - 1x10 Technic Brick (#2730)
2 nos. - 1x4 Technic Brick (#3701)
2 nos. - 1x2 Technic Brick (#3700)

4 nos. -   3x3 Liftarm (#32249)
2 nos. -  Liftarm 1x3 Thin (#6632)

4 nos. -  1x8 Plate (#3460)
4 nos. -  1x3 Plate  (#3623)
1 no.   - 1x2 Plate (#3023)

2 nos. -  2x2 Plate (#3022)

4 nos. -  Cross Axle 8M (#3707)

4 nos. -  Bush for Cross Axle (#6590)

2 nos. - Pin Joiner Round (#75535)


Rotational Base:
11 nos.  - Connector Peg/Cross Axle (#6562)
4 nos.    -  Connector Peg (#3673)

1 no. - Bush for Cross Axle (#6590)

2 nos. -  Liftarm 1x3 Thin (#6632)

1 no. - Cross Axle 6M (#3706)

1 nos. - 1x6 Technic Brick (#3894)

2 nos. - 2x8 Technic Plate (#3738)
1 no. - 1x8 Plate (#3460)

1 no.   - 40T Gear (#3649)
3 nos. -  8T Gear  (#3647)


Torso Rotational Servo Housing
1 no. - 1x6 Technic Brick (#3894)

1 no. - 2x8 Technic Plate (#3738)

2 nos. -  2x2 Plate (#3022)

1 no. - 16-Tooth Gear (#4019)

1 no. - 3L Axle with knob (#6587)

Tracks and Hubs:
2 nos. -  1x2 Technic Brick (#3700)
2 nos. -  1x4 Technic Brick (#3701)
1 no.   -  1x6 Technic Brick  (#3703)

4 nos. -  2x4 Technic Plate  (#3709)

3 nos. -  1x8 Plate (#3460)
2 nos. -  2x2 Plate (#3022)

4 nos. -  Bush for Cross Axle (#6590)

2 nos. -  Technic Sprocket Drive Wheel(Hub) (#32007)
2 nos. -  5" Caterpillar Treads (#680C01)

2 nos. -  16T Gear (#4019)
4 nos. -  24T Gear (#3648)

Castor:
1 no.   - 1x4 Technic Brick (#3701)
2 nos. - 1x6 Technic Brick (#3894)

2 nos. - 2x6 Technic Plate (#32001)
2 nos. - 2x4 Technic Plate (#3709)

2 nos. - 2x2 Plate (#3022)
6 nos. - 1x2 Plate (#3023)

1 no. - Cross Axle 6M (#3706)
1 no. - Cross Axle 4M (#3705)

2 nos. - Connector Peg/Cross Axle (#6562)

3 nos. - Liftarm 1x3 Thin (#6632)

2 nos. - 1/2 Bush (#32123)
1 no.   - 1/2 Bush Toothed Type II (#4265b)

3 nos. -  Bush for Cross Axle (#6590)

1 no. - Axle Joiner Perpendicular (#6536)

2 nos. - Wheels (Tire #87414, Hub #3482)


Left Arm Components
1 no. - Connector with Peg 3M (#32556)
1 no. - Connector Peg/Cross Axle (#6562)
1 no. - Connector Peg (#3673)

1 no. - Cross Axle 4M (#3705)

3 nos. -  Cross Axle 3M (#4519)
8 nos. - Cross Axle 2M with Groove(#32062)

1 no. - Perpendicular Axle Connector (#32039)
2 nos. - Perpendicular Axle Pin Connector (#6536)

2 nos. - Technic Lever (#6632)

1 no. - Pole Reverser Handle (#6553)

2 nos. - Angle Element [3], 157.5 Degrees (#32016)
1 no.   - Angle Element [4], 135 Degrees (#32192)
3 nos. - Angle Element [5], 112.5 Degrees (#32015)

1 no. - Ribbed 7 mm Dia. Tube 7L (#78c07)


Right Arm Components
2 nos. -  Connector Peg (#3673)
2 nos. - Connector Peg/Cross Axle (#6562)
1 no.   - Connector with Peg 3M (#32556)

1 no. - Liftarm 1x5 Thin (#32017)
1 no. - Lift arm 1x2 thin (#41677)

1 no. - Axle Towball (#2736)

1 no. - Axle Joiner (#6538b)
1 no. - Axle Conn Perp 3L (#32184)

3 nos. - Cross Axle 2M with Groove (#32062)

2 nos. - Technic Lever (#6632)

1 no. - Angle Element [2], 180 Degrees(#32034)
1 no. - Angle Element [4], 135 Degrees (#32192)

Target Bot
Note: This Target Bot is optional you can omit this part.
All the LEGO components are listed in Step 16.


Palm Arduino II
For the details, schematic and parts for Palm Arduino II go here.

Palm Arduino V3
For the details, schematic and parts for Palm Arduino V3 go here.

DIY Motor Controller PCB (Photo 4) or Motor Shield
For the details, schematic and parts for DIY Motor Controller go here.

Double Gearbox Kit
Tamiya 70097 Twin-Motor Gearbox Kit or similar.

Servos
2 nos. - 9g Micro Servo (T Pro SG90), or Power HD Micro Servo HD-1900A (Pololu #1050) or Adafruit's Micro Servo (#169) or similar.
1 no.   - Sub-Micro Servo 3.7g (Pololu #1053) or similar.


Tools
Razor Saw
X-acto Knife
Super Glue
Sugru





<p>Man this is cool! Love the head. (Kinda looks like Lucario)</p>
Do you have a video of the droid moving and shooting?
The video has been added in Step 17.
Yes, I have. I will put it up this weekend. Needed to celebrate the Stanley Cup with the Blackhawks today (Friday)! ;)
The (R) behind R/C LEGO is breaking parts of the valid XML in the RSS feed for the instructables webpage.
That is pretty sweet. I was going to recommend turning it into a RC Lego Johnny Five, but I see that was the inspiration for your design already.
Thanks.
pretty job ! <br> <br>could you pelase let me know where you buy these plastic material that use have used as chassis ? <br>
Thanks. <br>'plastic material'?? <br>Do you mean the blue plastic material in Step 5, that I used it to stick the Lego components? If so, I bought it from Instructables' Store, here is the link, <br>http://store.instructables.com/products/sugru. <br>But if you mean the LEGO components, you could get it from LEGO official store, <br>http://shop.lego.com/en-US/Pick-A-Brick-ByTheme, <br>or you could go to BrickLink.com (http://www.bricklink.com/index.asp) and find what you are looking for by searching the site using the components ID provided. <br> <br>Hope this help!

About This Instructable

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Bio: I am Electronic Visualization Artist. I look at things through the Looking Glasses.
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