Great Robot selects balls programmed in Scratch
BARCELONA
FROM LOGO TO SCRATCH 2.0
Technology Teacher:
Juan Ramón Fernández
tecnoelx@gmail.com
history
* In Spain the subject of technology started to be taught in the Secondary Schools in 1990, with students aged 12 to 17 years
*Among the blocks of content is Control and Robotics
*The Logo language has been widely used in the classroom-workshop to control the projects made by students
*We have always tried to use recyclable materials
*We can see two balls selected robots programmed in Logo
small
small
medium
other project with Logo
XL robot parts
finger
hand
arm
limit switch
controller cards
white deposit
blak deposit
LDR resistance
cams
description
* This is a robot whose main task is to classify balls white or black
*The robot is controlled by a program in Scratch
*The machine and the program communicate using 3 controller cards with light-dependent-resitor LDR "sensor screen", which are glued to the computer screen, and by means of a mechanical finger that will operate a keyboard
design made in Google SketchUp
operation
* The arm motor drives the bike wheel.
*The wheel has cams which actuate a limit switch, this allows the arm to stop in white deposit , black deposit and the initial ramp .
*At the end of the arm is installed a "small hair dryer" that sucks up table tennis balls
Communication between machine and computer
By loading program costumes on the computer screen ,these consist of bars may be white or black. On these bars will place the LDRs to control the motors.
We have 3 motors:
ARM MOTOR : to move the wheel.
HAND MOTOR "small hair dryer" , to catch the ball
FINGER MOTOR to move the mechanical finger.
construction process
circuit controller card
made with simulation Cocodrile software
general circuit
made with simulation Cocodrile software
robot "brain"
Below each "sensor screen", were placed the respective resistance LDR, to receive the corresponding signals of the screen.
Inside the hand also needs another LDR, which is the sensor that will distinguish if the ball is white or black , If the ball is white finger is pressed
(it's a logic gate "and".)
the robot positions
1
2
3
operating steps
1. In the initial position the hand is actuated
2.then the arm is directed towards the white deposit. On white tank analyzes the color. If white mechanical finger touches the key, which allows you to jump to a subroutine. It stops the hand, drops the ball and goes non-stop to initial ramp..
3. If it's black, the finger does not work, follows up black deposit, the hand drop the ball and will go to initial ramp.
Scratch costumes
Scratch code
Watch the code
the project works!!!!!!!
The students team
Thanks Master Ramón Gonzalo, we have learned a lot from you!!!!!!
my 6 main reflections to use Scratch in the classroom:
1. creativity
2. motivation
3. Easy to use
4. Easy to share
5. Programming real projects built by students
6. Easy use for all ages
my only reflection on Technology Education:
a country without technological education in its educational system is a country in process of underdevelopment
MAYBE,Our future project????
The XXL select balls
and most importantly, a class of motivated STUDENTS with a TEACHER who will guide them
I also had fun with my family practicing English by SCRATCH
THANK YOU FOR YOUR ATTENTION
Course 2012/13
Elche, Spain, 1 º High School, Industry Technology I
Students: David, Paula, Migue Angel, Jordi, Aitor, Imanol and Fran
Technology Teacher: Juan Ramon Fernandez
tecnoelx@gmail.com