Alvaro Prieto (@alvaroprieto) joined us to talk about the basics of debugging, from software to hardware. Some of the programmer devices we talked about: SEGGER JLink and Black Magic Probe. Chris mentioned a visual frontend for gdb called "Vulcan" but which is actually called Voltron. (He's got graphics on the brain). How did we forget to mention the six stages of debugging? Alvaro Prieto and Jen Costillo's new podcast on reverse engineering! And on Twitter as @unnamed_show. Alvaro's Cheese Cave: making cheese and cheese-lapse photography of Brie aging.

Kristen Dorsey explained MEMS sensors: how do they work, how they are made, and what new ones we expect to see in the future. Kristen’s website is kristendorsey.com. She is a professor of engineering at Smith College and runs the MicroSmithie. MEMS stands for microelectromechanical systems (Wiki). Used in some sensors, Galistan is a room-temp liquid with interesting properties (Wiki). A few interesting MEMS applications: Micronium: a tiny resonator making music 2-stroke gas engine Pinball machine One of Kristen's stretchy strain sensor, not MEMS (so you can see it)

Gretchen Bakke spoke with us about the future of power generation and transmission. Her book is The Grid: The Fraying Wires Between Americans and Our Energy Future. Gretchen is a professor of anthropology at McGill University. Gretchen’s website The book’s Facebook page Grechen’s first book is Anthropology of the Arts: A Reader

Kwabena Agyeman joined us to talk about making OpenMV (@OpenMVCam), an easy-to-use camera and control module with built-in machine vision functions, all interfaced via MicroPython. To learn more about computer vision, Kwabena suggested looking at PyImageSearch or reading the April tags code as it is a good introduction to image manipulation and matrix operations. Some other interesting links: Ferrari World, view from satellite Cloud Atlas (on Netflix) DIY Robotics from Chris Anderson: DIY Robocars Kwabena worked on the CMUCam (version 3) The Amp Hour had a good episode about MicroPython Elecia likes this introduction to linear algebra, matrix operations, and singular value decomposition (SVD) OpenMV on Hackaday.io and for sale at SparkFun The future of OpenMV might include Google’s MobileNets Kwabena gave a talk about the OpenMV manufacturing difficulties at the Hackaday Supercon 2016 and he plans to be there for Supercon 2017 (Pasadena, November 11th and 12th)

Dennis Jackson spoke with us about making the career shift from software to embedded. Dennis buys James Grenning’s Test Driven Development in Embedded C for his new hires and often recommends Elecia’s Making Embedded Systems. His tip that everyone should know was “Learn make!” and he has a reference for that: Why Use Make. He suggested Joel Spolsky’s reading lists from Joel On Software, even the ones that don’t obviously apply. Additional suggested-reading articles: 30 Pitfalls for Real Time Systems (part 1 and part 2) Rules for defensive C programming Why are you still using C What every computer scientist should know about floating point arithmetic The Power of Ten -- 10 Rules for Writing  Safety Critical Code . In his previous appearance on Embedded (#25: Don’t Be Clever), we talked about code complexity and measuring cyclomatic complexity. At that time he wanted a tool to monitor the code’s status. He has since found one: pmccabe. Dennis currently works at Element Science.

Alan Yates (@vk2zay) told us about his entries to the 2017 Flashing Light Prize. Alan's entries involved making a light bulb and dripping charge. Alan works at Valve. He told us about making virtual reality hardware in Embedded episode 162: I Am a Boomerang Enthusiast. Hackaday SuperCon is Nov 11-12, 2017 in Pasadena.

Pierre-Marie de Rodat (@pmderodat) joined us to talk about how debugger software works (and what compilers tell the debugger). Pierre-Marie works for AdaCore on GNATcoverage (among other things). His github repo is pmderodat. Note that the AdaCore sponsored Make with Ada competition is running right now but you still have time to enter! Last year’s winner, Stephane Carrez with EtherScope, made an Ethernet monitor for an STM32 board (github). GDB supports Python scripting!?!!!  DWARF is the most standard debugging data format. Before that it was stabs. To see this information in a Linux or Mac system, use objdump. (It is really interesting!) Foundation by Isaac Asimov

Elecia gave a talk about machine learning and robotics at the Hackaday July Meetup at SupplyFrame DesignLab (video!) and LA CrashSpace. She gives it again in the podcast while Chris narrates the demos.  Embedded Patreon Embedded show #187: Self Driving Arm is the interview with Professor Patrick Pilarski about machine learning and robotics applied to prosthetic limbs. I have also written more about my machine learning + robot arm on this blog. My code is in github (TyPEpyt). My machine learning board is Nvidia’s Jetson TX2. The Two Days to a Demo is a good starting point. However, if you are new to machine learning, a better and more thorough introduction is the Andrew Ng’s Machine Learning course on Coursera. To try out machine learning, look at Weka Data Mining Software in Java for getting to know your data and OpenIA Gym for understanding reinforcement learning algorithms I use the MeArm for my robot arm. For July 2017, the MeArm kit is on sale at the Hackaday store with the 30% off coupon given at the meetup (or in Embedded #207). Inverse kinematics is a common robotics problem, it took both Wiki and this blog post to give me some understanding. I wasn't sure about the Law of Cosines before starting to play with this so I made a drawing to imprint it into my brain. Robot Operating System (ROS) is the publisher-subscriber architecture and simulation system. (I wrote about ROS on this blog.) To learn about ROS, I read O’Reilly’s Programming Robots with ROS and spent a fair about of time looking at the robots on the ROS wiki page. I am using OpenCV in Python to track the laser. Their official tutorials are an excellent starting point. I recommend Adafruit’s PCA9685 I2C PWM/Servo controller for interfacing the Jetson (or RPi) to the MeArm. Finally, my talk notes and the Hackaday Poster!  

Natalie Silvanovich (@natashenka) discussed reverse engineering hardware, working on security software, and the fantastic world of Tamagotchis. Natalie's site and blog Hardware Excuse Generator  Original CCC 2012 talk: Many Tamagotchis Were Harmed in the Making of this Presentation CCC 2013 talk: Even More Tamagotchis Were Harmed in the Making of this Presentation  Natalie's upcoming BlackHat talk: Attacking ECMAScript Engines with Redefinition  Flash exploit article for Project Zero: One Perfect Bug: Exploiting Type Confusion in Flash  Tamagotchis are still available as are the works of Shel Silverstein (Snowball is in Falling Up).  Natalie's Tamagotchi board

Chris Svec (@christophersvec) has an idea about adding empathy to software development. It is a good idea. His blog is Said Svec. He works for iRobot and they are hiring. (Chris' email is given toward the end of the show but if you hit the contact link here, we'll pass along info to him.)  Obligatory cat video Embedded has an episode devoted to impostor syndrome.  O'Reilly's Head First book series is pretty awesome. Elecia is still talking about Thinking, Fast and Slow as a great way to understand brains. Chris Svec also recommends Make It Stick. The Richard Hamming quote came from his address to the Naval Postgraduate School. The whole lecture is available on YouTube.