This is the last lab of the year, the launcher lab. This lab is very different from the other labs because we had to follow build instructions to build the launcher, everyone should end up with the same machine at the end. The aim of this machine is to build a machine capable of launching a ping pong ball.This machine has a launching arm, and its angle is adjustable via the two bump switches in the back. A limit switch sets of the firing mechanism, which spins really fast, hammering the ball off of the machine.
PICTURES: https://drive.google.com/open?id=0B4Uro-Vq1PwkV21FMVJqdzUwZUU
This is the last lab of the year, the launcher lab. This lab is very different from the other labs because we had to follow build instructions to build the launcher, everyone should end up with the same machine at the end. The aim of this machine is to build a machine capable of launching a ping pong ball.This machine has a launching arm, and its angle is adjustable via the two bump switches in the back. A limit switch sets of the firing mechanism, which spins really fast, hammering the ball off of the machine.
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PICTURES: https://drive.google.com/open?id=0B4Uro-Vq1PwkZEFSU0FCV3Bza28 This is the second last vex project of the year, and it is also the last week of the school year. The point of this lab is to have a working machine that can sort three types of "trash" - represented by marbles in this case. The 3 marbles are wood, plastic, and steel. Steel is the heaviest marble, while the plastic marble is very shiny and reflective. We used these properties to our advantage. our design has a see-saw like mechanism to sort the steel. The heavy steel ball hits the seesaw and tips it. Those steel marbles then end up in a holding area. The wood and plastic marbles roll right past the seesaw, and after turning around, it reaches the mechanism which sorts between plastic and wood. The motor runs a feeder slowly , and it slides a marble past a light sensor. the light sensor is responsible for detecting the light reflectivity of the marble, and there is a flashlight positioned above the line tracker. If the reflectivity is low, then the sorter knows that the marble is wood, if the reflectivity value is high, then the sorter knows that the marble is plastic. After the reading, the robot moves a flipper. Th flipper then resets, and the ball ends up in the correct holding position
PICTURES: https://drive.google.com/open?id=0B4Uro-Vq1PwkSUdPQkMtMGZHdHM For this Lab, we were challenged to create an elevator that can serve three floors. It should be able to pick people up and then drop them off to in the bottom of the building. My elevator was really ambitious, being the tallest, and the sturdiest elevator, and plus - it looked cool. The elevator carriage is moved by a motor, which drives a pair of sprockets, which moves a chain attached to the elevator carriage, moving it up and down. there are limit switches on the top and bottom of the elevator, which gives it an ability to stop accurately. The quadrature encoder is responsible for making sure that the elevator can accurately reach the second floor. Each floor has a button and a status LED. The status led shows which level the elevator is at and will flash quickly if there is an emergency. when the emergency button is pressed, the elevator returns to the first floor (if it is somewhere else), then it disables all of the buttons, then makes the LEDs flash rapidly, signaling that you might want to use the stairs. PICTURES: https://drive.google.com/open?id=0B4Uro-Vq1PwkMTBSUzJPTmdtNmc Here is another vex lab from PoE. This project is a cookie topper, which is supposed to take "cookie dough" and add some toppings to them - "chocolate chips". Our machine is very ambitious but worked at the end. the machine used a conveyor belt with standoffs to take in the "cookies", which were simulated by wheels, then a sprocket connected to a servo motor spins, dispensing the "chocolate chips", which are tiny standoffs. The process continues and the cookies fall off of the conveyor belt into a holding area. the machine starts when a bump switch is pressed, and red and green LEDs indicate the status. When the red LED is on, then the machine is in motion, when the machine is not, then the green led turn on. Today in PoE - Principles of Engineering, We did and activity with circuits and finding the current, voltage, and resistance using the Ohm's Law. We constructed a parallel circuit in a PHET circuit construction simulation and then calculated the 3 properties. Above this paragraph you will find the animation of my circuit, it is a simple parallel resistance circuit. The circuit shows up in two forms, Real life, and schematic form. Here is the work for the calculations that i scanned out of my engineering notebook: ![]()
This year, I again participated in the bridge design contest 2016 that is hosed by Engineering encounters. I Finished building my bridge which came in at a cost of $179,946.84, And that was the lowest i could get it. As of now i am 20th in my school. Here is a screenshot of the design: Here is the link to the latest standings: http://judge.bridgecontest.org/standings/local/LJOY?page=1 Here is the project file(only usaable with bridge designer 2016): ![]()
It is the beginning of Semester 2 in school and we finally started doing robotics in POE. I was excited because I loved robotics, electronics, micro controllers, and coding. We built a "TestBed", which was a plate with a VEX cortex brain, connected to servos, motors, and sensors which was designed to teach us about the basic and advanced VEX robotics coding. I really enjoyed the lab and i earned a lot of coding skills. In this post, you will find pictures of my lab and a video that shows you some of the cool things that I learned and some of the things that I can do with the TestBed. This is another vehicle lab we did, except with the fact we cant use ramps/ catapults. we built upon our successful design last time with a heavier counterweight, a higher IMA, and bigger wheels. The counterweight now slides on fixed sliders rather than it dangling on a string, this created a more stable design.
This year, i participated in the bridge design contest 2015 that is hosed by Engineering encounters. I Finished building my bridge which came in at a cost of $181,342.92, And that was the lowest i could get it. As of now i am 14th in my school. Here is a screenshot of the design: Here is the link to the latest standings: http://judge.bridgecontest.org/standings/local/LJOY Here is the project file (Only usable with bridge designer 2015): ![]()
Another compound machine lab, but this was a fun one... I am really happy with my results of this lab. Find attached to this post the video of this lab and some pictures. This is the second Compound machine lab that i did this year. This was a fun and challenging lab because of all out design constraints listed below: Design Constraints: · The applied effort force is a trigger (such as a quick release and/or counterweight), as opposed to being powered by human input. Instructor may limit counterweight size. · The final design raises a wheel of your choice 5 inches using a pulley system with an IMA of 2. The 2+ mechanisms upstream which are driving this action must include a lever and a wheel and axle, but feel free to add more. · The compound machine must have a mechanical advantage greater than 1. · Equipment is limited to the materials in the VEX kit and any supplemental equipment that the instructor may supply. ·Design must be safe (instructor defined) to operate. Overall, i am happy with the results. attached to this post are the slo mo video of the lab and pictures. Today, We did a lab on simple machines. We learnt about All types of levers, wheel and axles, pulleys. It was fun building with the VEX EXR kits and calculation the IMAs.These Are Some Pictures of the Crane/Tank that I made for my POE compound machine lab 1. it has a giant crank which lifts the arm through the use of rope and a pulley transfer system. my machine has an overall IMA of 20.586. You can find a scan of my lab sheet attached to this post. 10/21/2015 PLTW Principles OF Engineering - Back To The Future - Sketching And EDP Exercise.Read Now
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AuthorHey there, my name is Surya, I'm 14 years old. Archives
May 2016
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