How to Do a Robot Car for a Ballon Battle

The purpose of the project is to build an attack-car to burst balloons which is bluetooth controlled either from a cell phone or design our own control.

Step 1: Collect the Material

In order to build it the material was mainly composed of two bluetooth modules, a card arduino, four wheels which have their electrical-engine each one and batteries to power the system. But the following list is all the material that we need (not counting the tools):

Arduino Uno
Arduino Mega
Thermal resistor
Mdf wood
Leds
Protoboards
Bluetooth Sparkfun mate silver
Adafruit Motor Shield v2.0
2 lithium batteries of 7.2V 3000mA (recommended)
2 Joysticks
2 Push buttons
Jumpers or wires
Resistors
3mm screws
2 Servomotors
4 DC motors with a wheel (as the image)
Styrofoam ball
Needles
Silicon
Adhesive tape

Step 2:

We should to do use a laser cutting machine in order to cut the mdf and obtain the chassis and weapon structure of our car.

In the design has to be contemplated that the structure has to be sufficiently strong but taking in account the characteristics of the DC motors provided, so the material is MDF also because the price of this material is relatively low.

The chassis which was decided to have the center of mass in the lower part as possible to have a low center of gravity to thereby minimize the risk of rollovers.

It was decided to have a hexagonal shape in the chassis due to the selected direction in order have the largest possible area of use, and the stability that is provided to attach the wheels.

The weapon was designed to have two degrees of freedom lever swivel style in order to cover a bigger area of attack, at gunpoint a ball with pins and a thermal resistance was placed, where the ball material was styrofoam, it was selected due to its characteristics of weight, hardness and price.

Step 3: Assembly

Now you should to assemble the car as the image.

We decided to use this steering system because it has great advantages such as fast 360-degree turn on its own axis, diagonal movements and movements in all directions.

Step 4: Connect the Circuits

We can see in the pictures that the circuits are no so hard and how we make our remote control for the car. The first picture is for the wheels, the second one for the attack system and the third one for the remote control.