Building a Customized Linux Image for Raspberry Pi with Yocto + Docker Support

Motivation I recently stumbled upon HypriotOS while looking for Docker-ready distributions for my Raspberry Pi 3B+. I flashed this onto and SD card and started playing around with it. It works incredibly well, but I noticed that it was built for armv7l which is a 32-bit implementation. Since the Raspberry Pi 3B+ has a 4x core Cortex-A53 which is 64 bit, I wanted to make use of the 64 bit processor! I’ve worked with Yocto before (in fact, my day…

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Hacking a Smart Outlet

IoT Everywhere Everything, and I mean everything is “smart” these days. Everyone has heard of the Internet of Things, and we are living through the emergence of some incredibly revolutionary connectivity. Some pretty cool and useful concepts have come out of it, admittedly, but there’s also some drawbacks. I really enjoy the idea of having smart outlets that I can command with my voice, and there are outlets-a-plenty on Amazon, but can I trust them? I’ve decided to use my…

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There’s a new USB-UART chip in town

I love Hackaday. I read it almost every day. Yesterday I a blog post caught my eye and I wanted to share it.   Most of the time if you want to add a USB interface to your project, you’ll have to get an FTDI chip, or one of those similarly operating knockoffs. But those chips require additional external circuitry that you may not want to fool with (I know I don’t). This Hackaday blog post introduces a neat little chip, the CH330.…

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Into the 3D printer game I went!

I’ve always wanted to try my hand at 3D printing, but prices were too high and the machines required too much maintenance… until recently.   I’ve purchased a Creality Ender 3 printer from Amazon in the past month or so. I grabbed the printer, along with a roll of grey AmazonBasics PLA, and decided to try my hand at 3D printing. My “all-in” budget was around $250, shipped. Now this printer is unique in several ways. It has a heated…

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Build Your Own: Clean Boost Guitar Pedal Part 2

The parts have arrived! It’s time for assembly.   PCB and Parts are here! The printed boards from OSHPARK arrived recently and so did the components. Below is a list of the components I selected for this board. Item Mfg Qty Description Enclosure Hammond 1 Aluminum enclosure for stompbox Resistors Elegoo 1 525 pack of assorted resistors from 0-1M Diodes MclgclM 1 100 pack of assorted diodes DC Barrel Jack ThreeBulls 1 12 pack of 5.5mm x 2.1mm Op-amp Fairchild…

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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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Diving into Java (updated)

I have never been heavily exposed to programming in Java, though I’m an Android person. I recently began reading online course material about programming in Java, and specifically, programming with the Swing GUI library. I had a need for a simple application to store information about ICs and other electronic components I have in my possession, so I thought I’d give Java a try! After figuring out Eclipse’s designer windows and GUI editing helpers, I was able to create an…

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