Sonar robot (multiple HC-SR04): Gastaud's version

Here is one more version of the sonar robot we have seen here. I would like to stress how fluid is the navigation of the robot. Give a look at the short movie to get convinced!

Photos

Bottom view.

Front view.

Top view.

The movie

Look at the robot moving in an homemade arena. It seems human operated but it is not! Just try yourself if you don't trust me.

• High quality (345MB)
• Low quality (35MB)

The sketch

Look at here for the libraries. The main program is not yet greatly optimized (not the main goal at present) but it works smoothly.

• gastaud2.ino

Enjoy!

Sonar robot (multiple HC-SR04): the components list

Here is the list of the modules, motors etc. that has been used to build the sonar robot. All the material can be easily found in specialized shop or on Ebay for few Euros. Pay attention to the version of the motor shield you have. It has to match the version of the library you have installed.

	2x DC Motor 3-6V and their wheels and tyres
	1x fixed wheel caster
	Motor Shield Adafruit 1438
	3x Ultrasonic sensor HC-SR04 (or similar)
	180 points prototype mini-breadboard (or similar)
	A bunch of cables (male-female and male-male)
	Patafix or blue tack
	Bi-adesive velcro stripe
	8mm acrylic sheet
	...and your friend Arduino!

Sonar Robot (multiple HC-SR04)

A big bravo to the students of Complexity class of Nice Sophia Antipolis University (France)!

Following the guidelines of this post, the students realized an explorer robot which can perform some basic obstacle avoidance.

Some photos

The material

The complete list of components and all the materials used to build the robot can be found here.

The software

• AF_Motor library (download it from GitHub here and follow this guidelines for its installation)
• HC-SR04 programming guidelines found here (see also the connected links)
• Homebrewed artificial intelligence inspired from here.

More photos, movies and software

• Gastaud's version
• {Balde, Diallo, Moulayeely, Yacoub}'s version (source code only)
• More to come!

Enjoy!

Robot makers: a funny head for your bot

We start this new section of our blog building a funny head for our future bot. As usual, we try to spend the less money we can and to have a nice final result. The idea is to build the head on top of a 2-DOF bracket as the one in the following figure that you can easily found on the market for a few bucks.

The material

Here is the list of the material you need for this instructable. All of them can easily be found either on your waste basket or in your pencil case.

Some construction paper. I used the paper box of cakes that you can
see in this figure.

A pair of scissors.

A pencil (and probably an eraser ;-) ). A ruler with millimeters scale will
also be of great help.

And the HC-SR04, your preferred ultrasonic sensor.

A 2-DOF pan-tilt bracket on which we will mount the head of our bot.

And some female-to-male cables (at least four to connect the HC-SR04 sensor).

First step

Draw on the construction paper the following diagram and cut it along the thick lines. Remark that according to the thickness of your paper you should adjust dimensions so that global dimensions are respected.

Second step
Draw on the hard paper the following diagram and cut it along the thick lines.