Smart Mirror

The Smart mirror can be used to display all sorts of data such as time, weather and notifications.

Engineer

Zain H.

Area of Interest

Mechanical engineering/Computer Science

School

Fremont High School

Grade

Rising Sophomore

Zain's Starter Project

My starter project was the useless machine. This project was really fun and easy to make.  I learned how to diagnose problems with my machine and then fix said problems. The purpose of the machine is to, when you flip the switch, and arm comes out from inside and flips the switch back

I built the useless machine.  Once the switch on the top is flipped, an arm from the inside reaches out and flips the switch back. The case is made from 7 plastic pieces and 4 posts that hold everything in place.  The arm extends and lifts up a portion of the top plate and flips the switch. Inside the case, there is a PCB which holds 2 resistors, the switch, an LED, a snap switch, and a screw terminal. The resistors reduce the number of electrons going through the circuit. The switch activates the arms’ movement and the LED lights up the arm as it moves. The snap switch is used as a stop for the arm so it does not move uncontrollably. And finally, the screw terminal holds the wires. These are all connected to the PCB which is connected to the motor.  The motor connects to the arm and moves it. The 2 wires from the motor are screwed into the terminal. There is also a battery holder which holds 3 AAA batteries. The 2 wires from the battery pack are also placed in the terminal and then the circuit is complete. I had a few problems along the way. At the beginning of the project when I was doing some soldering I accidentally didn’t fully solder the switch to the board. I didn’t notice at the time. Later when I was putting together what I thought was the finished project, I realized it was not working how I wanted it to. When the switch was flipped the arm only came up part of the way as the signal being sent from the flipped switch was inconsistent. The arm only came up and flipped the switch back around one out of five times. I checked all of the connections one by one, but realized that the connections of the wires were not the problem. I took off the PCB from the motor and checked the solder.  I saw that 2 of the 6 connections to the switch were faulty and did not fully connect the switch to the board. Once I fixed the solder in those areas the circuit was complete and that fixed the problem. Next, I will take the skills I learned today and apply them in the intensive project.

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