Hi! My name is Natalie. I am building with Legos and programming them with the Logo software called Microworlds EX Robotics Edition. I built a bumper car that has bumpers and sensors that enable it to stop, turn around, and go in the opposite direction when it runs into something. First, I built the car with Legos; it included a RCX Lego brick, an onboard wireless control center that lets the car go anywhere. Once the car was finished, I programmed it using a set of commands from a previous bumper car project. I had to download the commands using an infrared signal connected to the computer. When I tried the bumper car away from the computer, it only spun in circles. I had to experiment with the procedures until I found the mistake. Once I thought I had fixed the mistake, I downloaded the revised programming and tried the bumper car again. It worked, but it stopped and went in the opposite direction on its own without turning around. I had to go back to the programming commands and check them again; once I found the other mistake and downloaded again, the bumper car worked perfectly.
Below is a picture of the Lego bumper car and the procedures.
to start
forward
asetpower 3
csetpower 3
loop[drive]
end
to back
athisway
cthatway
aon
con
wait 5
aoff
coff
end
to forward
athatway
cthisway
aon
con
end
to left
athatway
cthatway
aon
con
wait 3
aoff
coff
end
to drive
ifelse switch1 [aoff coff back left forward] [aon con]
ifelse switch3 [aoff coff back left forward] [aon con]
end