Earlier this term we started to make a Lego robot called the EV3. Some times it got really frustrating when we tried to put a really important piece in but the piece wouldn’t go in the right spot and at the same time, after we tried for a long time and it finally went in I felt really relieved.
We did a drawing of the EV3 and named all the parts. Shortly after that we got some programming blocks to experiment with and see what happened after we changed the number, direction and power.
What did you notice? Differences/Similarities between seconds, degrees and rotations?
Challenge: 1 Move your robot forward from the start line to the finish line and back to the start without any turns.
If you click the green button you have an option to choose rotations, seconds or degrees. If you click on the red one you can change the direction your robot turns. The blue one shows your speed and power. When you change the number into the negatives it goes backwards with that speed and power. The black one represents the rotations. Rotations are when the wheel does one turn also known as a whole or 360 degrees. One rotation is eighteen centimetres long.
Seconds: The more the seconds, the longer it moves but that doesn’t give a result of how far it moves it only shows how long for. It all comes down to the power and speed to say. This is our programming to make it go one metre up and one metre back without turning. With this programming we found out that the EV3 went ten centimetres a second
Rotations: One rotation is one whole turn around the wheel. We measured that one rotation gets you eighteen centimetres. Our estimation of five point five rotations was pretty close to getting us one metre. I did a drawing representing how big the rotation was. It had one quarter of a rotation half and three quarters and one whole.
Make your EV3 go around a diamond like a baseball player.
In the programming we put the degrees on 65 so that it can make the turn accurately so it doesn’t go of track. We didn’t need the speed and power at the max so we programmed it on 50. I know that six rotations was close to a metre from our knowledge when we did the 1st challenge.
Make your EV3 go to somewhere and then do a 180 and come back to where you started.
It was really difficult for us to make it do a 180 because the highset number was 100 so we needed to calculate how much one degree was with the different format. We eventually got it and then put the rotations on six and got it working.