Does rotational weight matter on a bike

My last post sparked some interesting discussion among some of my cycling friends: Not all weight is equal. The consensus was that weight on the wheels was more important (2x-7x more important) than weight of the frame.  I'm having a hard time buying this... but wanted to clearly write out the arguments here. Acceleration and Rotational Inertia Work is the...Read More

How much does a gram matter?

disclaimer: I am going to use mixed units throughout this blog post. Get over it. I'll also be rounding a lot to the nearest order of magnitude. [caption id="attachment_1814" align="alignleft" width="300"] Stickers on my rims and frame totaled to about 10 grams.[/caption] I recently peeled all of the stickers off my mountain bike. They weighed in at 10 grams. My...Read More

Some Productivity Tips

I get things done. And as a boss, if there's one thing that I look for in employees, it's not intelligence or ability, but their ability to get stuff done. So here are some basic rules I have that help me be more productive day in and day out. 1) Turn off notifications More and more the research shows we...Read More

A Letter To My Brother about Finances

My brother is about to finish school and start his first job. I'm writing this post to him, based on lessons and things I've learned along the way, but hopefully it's helpful to everyone! My financial goal here is to live comfortably (not excessively) and be able to retire someday! If your employer has retirement matching, max it out! This is...Read More

Getting started with the Particle Photon

I love using all flavors of Arduino in the engineering classes I teach. They're great tools, and students do some truly awesome stuff with them. More and more, students want to build connected devices.  This used to require an expensive WiFi shield or Ethernet shield, or require the students to switch to developing on a Raspberry Pi. Enter the particle Photon:...Read More

Wireless Google Calendar Display using Raspberry Pi and Arduino

When I'm not in my office, I like for people to know where to find me. Am I teaching a class? Working from home? In the manufacturing area? So I thought it'd be cool to build a little device that I could put in my office window that shows where I'm at and when I'll be back... On the window...Read More

ATtiny85 and the Particle Photon

As you know: I love all things Arduino and use them extensively both as a hobby and as a teaching tool... I wanted to talk about a few products that I've been especially stoked on lately, just for those nerdy blog readers out there. ATtiny85 [caption id="attachment_1637" align="alignleft" width="300"] Here's the ATtiny connected to two 8-bit shift registers to give it...Read More

Home Buying

My last post was more than 8 months ago! I want to start updating my blog again, So we'll start with the biggest update I can think of: we bought a house. A little background: [caption id="attachment_1630" align="alignright" width="300"] In early 2015, Boulder housing prices began to climb steadily[/caption] The city of Boulder is surrounded by a moat of open-space...Read More