Kenji G.

Hello my name is Kenji and I am a rising freshman to Leland High School in Almaden. I chose the Useless Machine for my starter project because it looked really interesting and how it was able to teach me how to solder wires which will be very important. I also chose the RC Robot Tank for my main project which has a good combination of coding and engineering and will also fit into my 2 weeks time frame.

In my time during BlueStamp, I have learned the most about engineering than any thing I had done previously. I have only done an engineering course provided by my school and went to some coding class during the summer so going to BlueStamp really helped me out a lot. During this time, I learned how to code with an Arduino and build a robot with circuits and wires that I had never done before. I also learned many other important aspects and robotics that will help me greatly in the future.

Main Project: RC Robot Tank

The Remote Controlled Robot Tank is controlled by a wireless PS2 controller that has an Arduino and a DC motor control to receive the information. The chassis consisted of a universal plate, track and wheels at the sides and a double gearbox fit onto the plate.

Final Milestone

Hello my name is Kenji and I am a rising freshman to Leland highschool. For my main project I chose the RC Robot Tank and I have reached my final milestone and have finally completed the tank. From my second milestone, I added the PS2 controller and the wireless receiver that receives the instructions from the controller then transmits it to the Arduino and to the motor controller to turn the motors and drive the robot. During this time, I had to learn a lot of functions involved such as the if and else functions that helps to send the information appropriately without running into too many bugs. Some problems that I ran into was the wiring of the receiver, as you can see I have 6 wires from the receiver to the Arduino and they are labeled the Data, Command, Attention, Clock, 3.3V to power the receiver and Ground. Another problem was importing the library from the Arduino website into my receiver and interface the controller with instructions, this part took me over 3 days to figure out and was very frustrating. I was able to finish the final milestone even though I hoped to finish much sooner, also since I am only doing only 2 weeks I do not have enough time to do modifications and hope to make some in the future.

Second Milestone

I chose the Remote Controlled Robot Tank for my main project and I have reached my second milestone in completing this project. In my first milestone, I built the chassis and the structure of the robot while this milestone focused more on the programming and wiring of the robot. As you can see there is a lot of wiring between the arduino, motor driver, batteries and the gears which helps to send information to decide when to turn the gears. As of now, I am using the serial monitor within the arduino code to move the robot, forward, backwards, left and right. This will be switched to a PS2 controller in my third milestone. During this time, I had to learn a lot of the coding involved, the most important fact being that low with digitalWrite is the same as 0 in analogWrite and high in digitalWrite is the same as 255 in analogWrite. With this in mind, I would be able to make it move forward or backwards and also depending on the value of high, I would be able to make it move slower but with only the analogWrite since digitalWrite only allows the high or low and nothing else in between. Using the difference in speed I was able to make it turn left or right by allowing one wheel to rotate slower and thus turn the robot tank. I ran into many coding problems during this milestone and was also confused on many occasions on where the wires are supposed to go. As you can see all the wires are in a mess right now and I am going to solder them when I am confident in where they are supposed to go. I was able to finish the second milestone on time even though I hoped that I was able to finish this part earlier and I am very excited to move onto the third milestone and finish the project entirely.

First Milestone

My main project is the Remote Controlled Robot Tank and I have reached my first milestone in completing this project. For my first milestone, my goal is to complete the chassis of the robot and the gears to turn the wheels and track as well as the overall structure of the robot. As you can see, the gear in the center of the universal plate turns the wheels as I move the robot back and forth. However, I would not need to manually move this robot once I set up the motor and the remote control which will be my next milestone. During this time, I learned that the gear ratio in my gearbox helps it to speed up the rotation as well as synchronizing the tracks together. For my gearbox, it has a 114.7:1 gear ratio and I would be able to find the Wheel Torque when I multiply the motor torque with this ratio. Some challenges that I ran into while building this was the assembly of the double gearbox which consisted of many tiny parts that were very frustrating to keep track of and assemble into the final product. Another challenge was fitting the wheels and the gearbox into the universal plate, during this phase I did not have many instructions so I had to figure out the assembly myself as well as learn how to use a dremel to cut out the correct spaces. I was able to finish this milestone within the time limit which I had set my goal for and I would move onto my next milestone which is the Arduino and coding part of this project.

Starter Project: Useless Machine

For my starter project I chose the Useless Machine and basically what it does is that once I push the button, an arm will rise and push the button again to return itself to its original position. Some notable parts in this project is the walls that make up its structure and keep the machinery in the box, the switch that keeps everything moving, the battery, the LED light and the arm that pushes the switch. The switch is the most important part of this machine since it turns everything on and tells the motor to operates the machine when all the wires are in place. Some problems that I faced when making this machine is the walls and that I had to learn how to use a power drill just to keep the nails in place and hold onto the structure. Another big problem was the switch itself, I was unable to solder this part on correctly which lead to the arm not moving correctly and at the wrong time. This also lead to the LED light short-circuiting, making it flicker and turn on when not supposed to. All in all I was able to solve these problems fairly easily with the help of my instructors and I am excited to begin my main project the RC Robot Tank.

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