Thanks for sharing! Maybe I'm missing it, but I don't see the Security Director role listed on the careers page? I do see an Eng Director role listed under the R&D: Security section, however. Uncertain which is which. Thanks again!
Checked internally, the Eng Director within Security _is_ the Security, Director role. If you're looking to chat to someone about it in advance, then Thomas Owen is the CISO https://www.linkedin.com/in/thomas-rhys-owen/
I wrote an in-depth article about a project I've been working on -- the Open Trickler! In this article, I describe how I built it, how it works, and how you can build your own for under $60! The project is open-sourced and it uses off-the-shelf components. The controller was written with NodeJS and the mobile app with Flutter.
I hope that this content is high quality enough to justify the time you spend reading it, and how much time it took me to create it!
I’d love to hear your feedback and answer any questions!
I wrote a quick article to give an update on the incredible progress that's been made to the DIY accelerometer project I shared before[1]. Most notably, it's nearly six times faster!
This project is fully open-source[2] and I have no plans to sell it complete or even as a kit. Keeping it open allows contributors from all different backgrounds, which led to the improvements I describe here.
I'd love to hear your feedback and answer any questions!
Hi! I see a lot of "you could" in your reply, but I'd like to point out that I released this as an open-source DIY project so that anyone could do whatever tests they wanted. I encourage you to build your own -- I'd love to see what you can make and learn with it!
Nice! I have that board as well, but only played with it briefly. Do you have any data from your use of it on the pistol that you'd like to share? I've love to see how it turned out.
Based on the feedback from my previous experiment[1], I wrote an in-depth article about the accelerometer unit I built. In this article, I describe how I built it, how it works, and how you can build your own for under $50! The project is open-sourced and it uses off-the-shelf components. Data analysis was done using Python, Pandas, and Plotly.
I hope that this content is high quality enough to justify the time you spend reading it, and how much time it took me to create it!
I’d love to hear your feedback and answer any questions!
You could try making it wireless rather than put the logging on the gun. Something like an Esp8266 might do it if you buffer the measurements. Also look at the Particle Photon which will do TCP out of the box. Squirt the data to a pi and do the logging on there.
Your problem is that you need to find some asynchronous storage or transmission method. For example in barebones avr, writing to the spi data register initiates a transfer, but you can do other things while you wait ~8 clocks for it to send. Interleaving like this can go quite a long way on 8 bit hardware.
In Arduino, there may be a lot of safety checking and blocking going on. Other chips (eg ARM) can do things like DMA where you can route data from eg a serial port straight into something else.
Thanks for the feedback!
The Feather board I'm using actually has Bluetooth, but I have not explored using it yet. If it's faster to send data over BLE to an app, then that would make this project even more affordable and smaller because the SD card and RTC are no longer required.
I believe the Feather M0 board I'm using is also capable of running CircuitPython (fork of MicroPython). For this project, I wanted to keep it simple, so I opted for Arduino, though I am more familiar with Python.
I believe I provided both imperial and metric units for every equation. Maybe I missed one? I'd be happy to correct it if you can point me to the specific instance!
Thanks for the question! Keep in mind that a huge explosion (with 40,000 PSI) is happening inside the chamber of the gun. Some of that energy pushes the bullet forward and the rest pushes the gun backward. You're right though, the gases escaping the barrel also contribute to this, similar to a rocket engine!
