# Title Team Members TA Documents Sponsor
54 Pancake Flipper
David Lin
James Lu
Jason Kim
Abhisheka Mathur Sekar design_document2.pdf
Team Members:
- James Lu (jameslu2)
- Jason Kim (jasonsk3)
- David Lin (davidzl2)

# Problem
When flipping pancakes at home, many things can go wrong. For example, the pancake can rip, fold on itself, burn, and deform. There are many tools that automate making pancakes, but they have set sizes for the pancakes. This is an issue for varying appetite sizes.

# Solution

Describe your design at a high-level, how it solves the problem, and introduce the subsystems of your project.
Our design automates the task of flipping pancakes. It is a device that can be used on a home and portable stove. The device has a metal plate that is placed directly on top of a heat source such as a stove. Pancakes are cooked on the metal plate. Using various sensors, an appropriate duration for cooking the pancake is determined to avoid undercooking or burning. After the cooking period, the pancake is flipped, and another timer is set to cook the other side. With automation, pancakes are less prone to ripping, folding, and deforming during the flipping process. This device allows the user to cook a pancake with a size of their choice by letting the user pour the batter manually. The subsystems include the timer, the message system, the pancake measurement system, the temperature sensor, and the flipper.

# Solution Components

## Subsystem 1 Timer

The timer is adjusted according to the size of the pancake, it basically sets a certain amount of time that the pancake needs to be cooked before it gets flipped. By doing so, the system makes sure to avoid overcooking and undercooking.

Possible Timer: DC 5V-36V Timer Module Trigger Cycle Delay Timer Switch Turn On/Off Relay Module with LED Display
## Subsystem 2 Pancake Measurement System
The pancake measurement system provides an estimate for the size of the pancake which is used as an input to calculate how long the pancake batter should be cooked before flipping. In order to obtain an estimate for the size of the pancake, an ultrasonic sensor is moved along the center of the metal plate facing downward onto the pancake. The difference in distance between the sensor and both the pancake and the plate, along with the speed of the sensor as it moves across the center of the plate, is used to calculate the pancake's diameter for size estimation. The calculations will be done in the MCU.

Possible ultrasonic sensor: cusa_t75_18_2400_th
Possible MCU: STM32F303K8T6TR

## Subsystem 3 Temperature Sensor
The temperature sensor measures the temperature of the stove and the surface temperature of the pancake. Once the temperature sensor detects a certain temperature on the stove, the system will notify the display bar to display the message of letting the user pour the batter. Once the pancake is flipped, the temperature sensor will then start detecting for a certain temperature which would tell the user that the pancake is ready. By using the temperature sensor, the system makes sure that the pancake is thoroughly cooked.

Possible temperature sensor: Amphenol JS8746B-0.20 Industrial Temperature Sensors

## Subsystem 4 Display Bar
The display bar tells the user the instructions to make the pancake, such as when to start pouring the batter, when the pancake is ready. The display bar is triggered by the temperature sensor detection, in that way, the system ensures to provide the users with the correct instructions.

## Subsystem 5 Flipper

When it is time to flip the pancake, the MCU will control some servos in order to create a flipping motion.

# Criterion For Success

Describe high-level goals that your project needs to achieve to be effective. These goals need to be clearly testable and not subjective.
Successfully flipping the pancake without folding and ripping
Make sure the pancake is thoroughly cooked by measuring internal temperature.
The ultrasonic sensor subsystem should be able to return the diameter of the pancake.
Timer is adjusted to the size of the pancake.
Display bar displays the correct message at the correct time.

El Durazno Wind Turbine Project

Alexander Hardiek, Saanil Joshi, Ganpath Karl

El Durazno Wind Turbine Project

Featured Project

Partners: Alexander Hardiek (ahardi6), Saanil Joshi (stjoshi2), and Ganpath Karl (gkarl2)

Project Description: We have decided to innovate a low cost wind turbine to help the villagers of El Durazno in Guatemala access water from mountains, based on the pitch of Prof. Ann Witmer.

Problem: There is currently no water distribution system in place for the villagers to gain access to water. They have to travel my foot over larger distances on mountainous terrain to fetch water. For this reason, it would be better if water could be pumped to a containment tank closer to the village and hopefully distributed with the help of a gravity flow system.

There is an electrical grid system present, however, it is too expensive for the villagers to use. Therefore, we need a cheap renewable energy solution to the problem. Solar energy is not possible as the mountain does not receive enough solar energy to power a motor. Wind energy is a good alternative as the wind speeds and high and since it is a mountain, there is no hindrance to the wind flow.

Solution Overview: We are solving the power generation challenge created by a mismatch between the speed of the wind and the necessary rotational speed required to produce power by the turbine’s generator. We have access to several used car parts, allowing us to salvage or modify different induction motors and gears to make the system work.

We have two approaches we are taking. One method is converting the induction motor to a generator by removing the need of an initial battery input and using the magnetic field created by the magnets. The other method is to rewire the stator so the motor can spin at the necessary rpm.

Subsystems: Our system components are split into two categories: Mechanical and Electrical. All mechanical components came from a used Toyota car such as the wheel hub cap, serpentine belt, car body blade, wheel hub, torsion rod. These components help us covert wind energy into mechanical energy and are already built and ready. Meanwhile, the electrical components are available in the car such as the alternator (induction motor) and are designed by us such as the power electronics (AC/DC converters). We will use capacitors, diodes, relays, resistors and integrated circuits on our printed circuit boards to develop the power electronics. Our electrical components convert the mechanical energy in the turbine into electrical energy available to the residents.

Criterion for success: Our project will be successful when we can successfully convert the available wind energy from our meteorological data into electricity at a low cost from reusable parts available to the residents of El Durazno. In the future, their residents will prototype several versions of our turbine to pump water from the mountains.