Class Prerequisite Graphs for VT

From conorpp.com 8 years ago in Blogs Security

Here are the class prerequisite graphs for all of the departments at Virginia Tech (Fall 2015). Sorry for those that are bandwidth impaired. It was made by scraping this page and passing the results to a graph function in Wolfram Language. Source code (sorry it’s messy). I’m missing ENGL, STAT,...

Articles from Conor Patrick

3D printing a programming jig and embedding pogo pins

From conorpp.com 5 years ago in Blogs Security

When using a microcontroller in a custom design, there’s always a bit of a headache for me because I need to figure out a convenient way break stuff out for programming and development. Usually you can’t afford to get the...

Designing Solo, a new U2F/FIDO2 Token

From conorpp.com 5 years ago in Blogs Security

For the past couple years, I’ve been selling U2F tokens on Amazon. I’ve been selling an average of 150 units per month and have ordered multiple batches over the past two years. Due to recent developments with FIDO2, WebAuthn, and...

Detecting lines on technical drawings

From conorpp.com 5 years ago in Blogs Security

Over the past few months I’ve been working on a program to convert images of technical drawings into digital formats. In other words, the program will convert an image like this. Into a digital format that can be used in...

My home workspace

From conorpp.com 5 years ago in Blogs Security

Everyone’s workspace is different. Mine is a culmination of things that I’ve seen from other people’s workspaces and tools that I’ve found useful. Here is my main desk. It’s a bit messy but that’s okay. I use it as a...

Quick electric skateboard build

From conorpp.com 5 years ago in Blogs Security

A friend and I recently decided to get electric longboards. Except most of them suck or are pretty expensive. We figured maybe the DIY route wouldn’t be too hard and we could make something pretty sweet. I wanted to make...

U2F Zero year in review

From conorpp.com 5 years ago in Blogs Security

I wanted to share some details on the U2F Project now that it has been on the market for over a year now. This is to give an idea of what to expect in terms of cost and profit from...

Designing a clock with levitating arms (part 1)

From conorpp.com 6 years ago in Blogs Security

At some point I developed an interest in magnetic levitation. And I decided to make a clock with levitating arms. I thought it would be a great opportunity to get some more analog circuit experience. It would also be a...

Randomly generating 3D mazes to 3D print

From conorpp.com 6 years ago in Blogs Security

I recently got a 3D printer for home prototyping. One thing I wanted to make was a puzzle that took advantage of the strengths of 3D printing. I didn’t really find anything I liked on Thingiverse so I decided to...

Proof of concept for a reconfigurable mold

From conorpp.com 6 years ago in Blogs Security

If you want to mass produce some physical product in a short amount of time, chances are you would need to get a mold made. Most plastic parts get made via a plastic injection molding process, where molten plastic is...

Last post on emulating a credit card

From conorpp.com 6 years ago in Blogs Security

This is an update to a previous post about designing a credit card emulator. I got a custom made coil and it didn’t work. I’m concluding the project here. I first attempted to generate a magnetic field using only PCB...