Project 7: Chain Reaction

Document YOUR group's robot with a post below.

  1. Include your partner(s) as a co-author
  2. Write a couple sentences describing the robot, namely how it is "triggered" and what sensor the robot after you was using. And how either of those influenced your design decisions.
  3. Include picture(s) documenting your solution
  4. Optional you can include a video of your particular sub-system working

Video of Final Chain Reaction:

Include your documentation below.



Project 7 Posts

Our robot was the eighth one of the sequence. It is driven by one motor so that we can ensure it moves straightly. It's triggered by a touch sensor and start the next robot by pressing its button. Since our robot is relatively high, we use four front wheels to make it more stable.

Apr 12 2018 Read →

CHAIN REACTION

Shunta Muto, Osvaldo Calzada

Our robot consisted of 2 wheelers with ultrasonic sensor and touch sensor as inputs.

Ultrasonic sensor initiated the motors and touch sensor stopped the motors when it touched the wall.

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Apr 12 2018 Read →

Chain Reaction

Annalisa DeBari and Andrew Sack

Description: Our robot used the touch sensor as an input, which drove the motor to rotate an arm and press the next group's touch sensor, which we attached to the body of our robot to ensure proper force on the sensor. The mechanical components include the wheel on the touch sensor to create a larger target for the group's robot in front of ours, wheels to allow our robot to move with the next robot as it traveled, and a motor attached to an arm which pressed the touch sensor of the next robot in the line.

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Apr 12 2018 Read →

This robot was the third robot in the sequence. It was activated by an ultrasonic sensor triggered by the preceding group. The next robot in the sequence was activated by exposing its light sensor, so they placed a solid object above the sensor that we knocked off at the appropriate time.  We created a helicopter rotor-like arm that swung when activated. To keep the system stable, we added a counterbalance to the swinging arm with the use of extra wheels. This action triggered the next motion and continue the chain of events.

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Apr 12 2018 Read →

Robot Chain Reaction:

For our robot, we used a light sensor to trigger the motion of the robot. We placed an eraser on top of the sensor and when knocked off by the prior robot, the robot would move forward and actuate the next chain link . We chose a light sensor, due to being one of the more difficult sensors to actuate and wanted it to get it out of the way early in the chain so to ease the motion of the other links.

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In the chain ours was the fourth one. Once the prior robot swung its arm it would knock the eraser off thus giving the light sensor light and moving the robot forward.

Apr 11 2018 Read →

Description:

This robot was constructed as the sixth in the sequence of eleven.  It was triggered by the fifth via touch sensor.  The sensor was mounted on extended beams off the rear of the bot as seen in the documentation below.  This was done to avoid being tangled with the triggering bot.  This robot set robot seven in motion by passing by an ultra sonic sensor that was mounted off the rear of the bot.

Photo:

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Subsystem Video:

Apr 9 2018 Read →

Bumpy McBumppants

Our robot was triggered by the motion of the preceding robot in front of the ultrasonic sensor mounted on the right side of ours. The preceding robot had a very low profile, so we mounted the sensor low to the ground.

Our robot then triggered the subsequent robot by driving into a touch sensor mounted on its rear. As a result, we constructed a front bumper of sorts for our robot to push the touch sensor with. Due to the instability caused by the narrow wheel base of the subsequent robot, we deliberately placed our robot just within range of it. This meant that it bumped the button without shoving the robot forward at all.

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Apr 8 2018 Read →

The robot moved like a tricycle. Its motion was triggered by the ultrasonic sensor--when the robot before it in line got close enough, it would begin to move. The following robot was triggered by a touch sensor, so we designed a ram for the front of the robot to maximize surface area, to ensure that the button was pushed with enough force.

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Ram at the left of the robot, ultrasonic sensor on the right

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Top view

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The ultrasonic sensor is at a height where it can recognize the short robot that triggered it

Apr 7 2018 Read →

Chain React: Touch Sensor Activiation

My robot was 2nd in the sequence, and was activated by the touch sensor. The next robot in the series was activated by the sonar, so it did not necessitate the use of a driving robot, so I simply attached a motor that would turn on and swing a flat panel to trigger the sonar of the next group's robot.

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Apr 6 2018 Read →

START-BOT

This robot was made with a sound sensor (because it was the first robot in the chain reaction) and two motors with large wheels to support the NXT. A third small wheel was mounted in the front of the bot for stability. Mounted on the top was a third wheel that was horizontally placed, such that when the sound sensor was triggered, the robot would drive forward, so that the mounted wheel would connect with the button on the second robot. Paper was taped to the wheel to increase the consistency of the button press.

Bottom View

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Top View

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Apr 5 2018 Read →

Chain Reaction Robot:

Our robot is driven by a single motor and triggered by a single touch sensor. An extra motor was attached for programming purposes, but was not used.

The touch sensor was attached to the other robot but connected to our robot. Once the button was pressed, out robot was triggered to drive forward, dragging the other robot along with it.

Our robot then drove in front of an ultrasonic sensor of the next robot to trigger the next step of the EV3 chain.

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Above: Overhead view of the robot (touch sensor not shown).

Below: Side view of the robot (touch sensor not shown).

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Below: The touch sensor attached to the preceding robot.

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Result: Our 3-brick-sub-system consistently worked.

Apr 5 2018 Read →