Photo by Cam Bradford on Unsplash

There are a ton of Teslas on the coasts of the US. And because they all look the same, Tesla owners love customizing their cars. Additionally, they absolutely hate wind noise.

Here are some aesthetic and functional accessories to make your Model Y unique and quieter.

Efficiency

EV owners are obsessed with efficiency. A spoiler reduces drag by “smoothing” the air behind the car. Less drag means higher efficiency.

This is one of the reasons why the Model Y Performance has a carbon fiber spoiler on top of the trunk! For other trims, a spoiler can be easily added.

When I…


Photo by David von Diemar on Unsplash

One question that Model Y owners get a lot from people riding with them is “how do I open the door?”

People who have never ridden in a Model Y before typically don’t know how to open the door, often pulling on the emergency release lever. Unfortunately this can damage the window or the window trim. This is because the windows does not lower when the emergency release lever is pulled and so the window hits the window trim.

You can prevent this issue with these “OPEN DOOR” stickers¹. And if a passenger does ask how to open the door…


The Math Checks Out

Uber Eats is incredibly convenient. What if I told you it can be cheaper than making food from scratch? I’ll prove it! No tricks. No B.S. Just math.

Photo by eggbank on Unsplash

Introduction

First, we’ll see how much Americans spend on groceries, then we’ll see how much more ordering all meals on Uber Eats would cost. We’ll then examine that difference in cost and make a conclusion.

Typical Spending

Groceries

According to the U.S. Department of Agriculture, the national average for cost of groceries for two adults ranges between $410.60 to $815.60 per month, depending on spending habits¹. These are average, so about half of the nation will…


If the copper in pennies is worth more than 1 cent, why aren’t people melting pennies to get rich?

You may have read that a penny costs the US Mint more than a penny in material costs. Is this true? Should we melt pennies to get rich? We will explore this topic.

Photo by Jonathan Brinkhorst on Unsplash

Background

For much of their history, US pennies were mostly copper. Pennies made on or before 1982 were, made with 95% copper and 5% zinc. (Post-1982 pennies are 2.5% copper and 97.5% zinc)¹.

From this, it would seem that it’s a good idea to melt pennies for their copper. Though it’s currently not legal to melt pennies for monetary gain², let’s temporarily imagine the US phased out the…


Photo by Taun Stewart on Unsplash

There are a ton of Teslas on the coasts of the US. And because they all look the same, Tesla owners love customizing their cars.

Here are some aesthetic and functional accessories to make your Model 3 your own.

Efficiency

EV owners are obsessed with efficiency. A spoiler reduces drag by “smoothing” the air behind the car. Less drag means higher efficiency.

This is one of the reasons why the Model 3 Performance has a carbon fiber spoiler on top of the trunk! For other trims, a spoiler can be easily added.

When I added my spoiler to my car, I…


A Technical Literature Review

This literature review was originally written in December 2017 by Matthew Cheung, for the graduate-level course ME 290R (Topics in Manufacturing — Nanoscale Manipulation of Materials) at the University of California, Berkeley.

Photo by Christian Wiediger on Unsplash

Abstract

Historically, microprocessor die size has stayed relatively constant. While performance has increased due to the increased number of transistors, total microprocessor package heat production levels have stayed relatively stable. Thus, in order to further increase computational density beyond increases due to Moore’s law, microprocessor cooler manufacturers have been pushing to make coolers smaller, even attempting to integrate cooling systems into the microprocessor dies themselves. …


This Could Save You a Ton of Money

If you’re like me, you don’t enjoy paying taxes.

I understand that taxes are sometimes necessary, but at times, they can be burdensome.

Photo by Joshua Rawson-Harris on Unsplash

I live in the San Francisco Bay Area, where sales tax (paid to the California DMV) when registering a new car is about 9.25%.


Photo by Bram Van Oost on Unsplash

One question that Model 3 owners get a lot from people riding with them is “how do I open the door?”

People who have never ridden in a Model 3 before typically don’t know how to open the door, often pulling on the emergency release lever. Unfortunately this can damage the window or the window trim. This is because the windows does not lower when the emergency release lever is pulled and so the window hits the window trim.

You can prevent this issue with these “OPEN DOOR” stickers¹. And if a passenger does ask how to open the door…


Photo by Charlie Deets on Unsplash

EV drivers hate noise. Wind noise is air howling at you. And tire/road noise is an equally annoying hum.

How is wind noise and road noise is produced? I’ll explain both of these and then present solutions to reduce the noise. The goal is to make driving the Model 3 a more pleasant experience than it already is.

Wind Noise

Wind noise is caused by wind hitting the cars surfaces and catching in the panel gaps. This causes turbulent airflow. The more turbulent the air, the noisier it is.

One major source of wind noise are the gaps in the panoramic sunroof…


Coffee. Work. Snacks. Work. Lunch. Work. Snacks. Work. Dinner. Sleep.

Photo by Krisztian Tabori on Unsplash.

In Silicon Valley, there are quite a few Product Design Engineers. We are mechanical engineers who design consumer electronics or hardware. Think: the people who make sure your phone doesn’t break after one drop.

For example, at my previous role at Apple, I designed, prototyped, and tested next-gen MacBook hardware.

People wonder what my day looks like so following is a typical schedule:

Typical Schedule

Morning

5:30 AM: Morning activities.

  • Wake up, change, brush teeth, etc.
  • Read some early morning news. Potentially make some pre-market stock trades or set up some trades to occur during the day.
  • Work on the side business.

6:30…

Matthew Cheung

iPhone Product Design Engineer @ Apple | Formerly Tesla, SpaceX, Boosted | Berkeley Mechanical Engineer | Based in Silicon Valley

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