Build Your Own Router – Part 2

BYOR part deux Hello all! I’m back again with part two of the Build Your Own Router Series! In this post, we’re going to do the following: Talk about our proposed network architecture Set up our interfaces Set up a DHCP server and define our subnets Define some subnet ranges for our devices Set up some DHCP reservations Set up a DNS cache server Set up some basic iptables rules and forwarding What you must have before this point You…

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Build Your Own Router – Part 1

Hi all, Since many folks these days are talking about VPNs and improving their online security, I thought I’d write a series on my approach to this. In this series, I want to cover the following: Why would you build a router to improve your privacy? What are the basic skills needed for building your own router? What hardware is needed? What software is needed? What does all this effort buy me? I’ll address these questions and more as I…

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Presenting…. The MIDI Control Surface (Rev. A)

Hi all! I’ve finally gotten around to posting the pics of the MIDI control service project I was working on. Here are the details on this guy: Total Cost to Build: ~$60 if you count the hot glue gun, $45 ish if you don’t Total Time to Build: ~A month of planning, a weekend of building, a few weeks of tweaking software How’s it made? The guts This project has the following components: 1 wooden cigar box from a hobby…

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I’ve been busy working, but I’ve started a side project

Hi folks! It’s been a long while since my last post. I’ve been working like crazy and preparing for my wedding! I have picked up a side project however. I wanted to learn about how a multitasking kernel does its thing at the basic level. So I grabbed an ATMEGA328P and built a little kernel for myself. You can go explore it at my GitHub repo. Introducing littleKernel As the name implies, it is a little kernel. I’ve built this little…

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Reliably identifying discrete colors from an RGB color sensor

For my Capstone Design project, one of my many tasks was to identify discrete colors on painted blocks (red, green, blue, yellow) using a the TCS34725 color sensor. I configured the color sensor to pass back four 16-bit integers representing the RGB and Clear color values of the reflected object that the sensor is “looking” at. Initially, I tried a simple linear matrix equation to map the input RGBC values to RGBy output numbers. I then took the highest output value…

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It’s been a while again!

I have been very busy with Capstone Design again this semester so I’ve not had any time to myself. However, I have quite a lot to write about! School I am wrapping up my final few classes and getting ready for graduation! This semester I have taken several rather applicable classes to my upcoming work situation. My favorite class has absolutely been Embedded Systems. This class goes from the question What is an embedded system? through What are the considerations when designing an embedded…

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It’s Been a While!

I’ve not posted in a few months, mainly because I’ve been extremely busy! Here’s what I’ve been up to recently. School I just finished up the semester and finals were rough, but I came out with great success. I really enjoyed a few of my classes. Namely, Computer Architecture, where I studied how the MIPS32 ISA was designed, and then implemented several hardware versions of it. The second best class was Digital Systems Design where I was introduced to VHDL and was able…

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Autonomy is Cool… and Hard!

Beginning in the last week of August, I joined The University of Alabama’s IEEE Autonomous Robotics Senior Design Team for 2016. I am the System Architecture and Integration Lead. UA has sent fiercely competitive teams to this competition for the past several years, though none have won. This year’s team is staffed with motivated, driven individuals and we are attempting to bring home first place for UA for the first time. I have linked the official competition rules below. IEEE…

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NSA Playset

Today an article ran on ArsTechnica which caught my eye. It’s titled The NSA Playset: Espionage tools for the rest of us and talks about the creation of a collection of NSA-ANT-like devices for doing… NSA-like things. One device — a deceptively simple device — caught my attention. It is called the CONGAFLOCK. This single transistor RF reflector can be implanted into anything that transmits data via wires. The resultant device can be hit with a continuous wave at the frequency of the bug’s…

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