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  1. ammolytics

    Detailed Comparison of the LabRadar, MagnetoSpeed, and Two-Box chronographs

    Thank you! Great feedback about the chart -- I'll add one.
  2. ammolytics

    Detailed Comparison of the LabRadar, MagnetoSpeed, and Two-Box chronographs

    Hey SH! Wow, this one was a lot of work but it's finally here! If you've ever wondered how these chronographs stack up to one another, or want to drown yourself in data this weekend, then I've got an article for you. https://blog.ammolytics.com/2019-09-06/chrono-comparison.html For this test...
    • ammolytics
    • Thread
    • ammolytics chrono chronograph labradar magnetospeed
    • Replies: 11
    • Forum: The Armory
  3. ammolytics

    Ohh my ! Area 419 AD FX120

    (You might have me confused with the other guy.) The Open Trickler has bluetooth already and you can build your own today for roughly $60.
  4. ammolytics

    Ohh my ! Area 419 AD FX120

    Hey folks, I'm happy to answer any questions about the Open Trickler project!
  5. ammolytics

    Open Trickler: The DIY Smart Powder Trickler

    I'd love to find a better way, especially if it uses parts that are easy for anyone to find. I don't have either of those cases lying around, but I may try a .223 or .308 case to see if they'll work. Honestly though, you could just zip tie the motor to the outside of the tube and plug one end...
  6. ammolytics

    Open Trickler: The DIY Smart Powder Trickler

    Thanks!
  7. ammolytics

    Open Trickler: The DIY Smart Powder Trickler

    Hey everyone! I wrote an in-depth article about a project I've been working on -- the Open Trickler! https://blog.ammolytics.com/2019-04-30/diy-smart-trickler.html 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...
  8. ammolytics

    Project: Inexpensive Rifle Accelerometer

    Thanks for sharing, I hadn't seen this article before! Yes, this was essentially the same idea I had when I first built it. I wanted to see if I could detect things like flinch or bad trigger pulls (left/right) during a shot that corresponded to a bad score. My local league is getting all...
  9. ammolytics

    Project: Inexpensive Rifle Accelerometer

    Hey everyone, I just posted a new article giving an update about the latest changes to this project, including the huge performance boost! https://blog.ammolytics.com/2019-02-23/rifle-accelerometer-update.html
  10. ammolytics

    Project: Inexpensive Rifle Accelerometer

    I recommend the Adafruit guide, which includes very detailed wiring instructions. That's precisely what I followed. https://learn.adafruit.com/adafruit-lis3dh-triple-axis-accelerometer-breakout?view=all To use the project and code as-is, you'll need to follow the guide for I2C instead of SPI...
  11. ammolytics

    Project: Inexpensive Rifle Accelerometer

    Awesome! Looking forward to seeing some photos!
  12. ammolytics

    Project: Inexpensive Rifle Accelerometer

    Thanks for sharing -- I'm really proud to have my work shared on Hackaday!
  13. ammolytics

    Project: Inexpensive Rifle Accelerometer

    The Adafruit LIS3DH source code is here: https://github.com/adafruit/Adafruit_LIS3DH There are similarities -- the data rate can be set with this function: https://github.com/adafruit/Adafruit_LIS3DH/blob/master/Adafruit_LIS3DH.h#L128 I wish it were as simple as changing the settings though...
  14. ammolytics

    Project: Inexpensive Rifle Accelerometer

    I believe you're viewing the code from Sparkfun. They sell the sensor on a breakout board too, but their code is different from the one I'm using which is from Adafruit.
  15. ammolytics

    Project: Inexpensive Rifle Accelerometer

    You should be able to read the comment thread on GitHub without creating an account, though you'd need to sign up if you want to chime in. I did compare the timing difference between reading raw sensor values vs getting the converted values. The difference is only ~20 microseconds, which is...
  16. ammolytics

    Project: Inexpensive Rifle Accelerometer

    Plugging in the battery. I think I addressed this under the "Future Improvements" section?
  17. ammolytics

    Project: Inexpensive Rifle Accelerometer

    If you're interested in following along, I've already received some excellent feedback from another reader who has helped to speed up the sensor by 3-times and significantly reduce the output filesizes (numbers not yet available). This discussion is happening over on the GitHub repo where I...
  18. ammolytics

    Project: Inexpensive Rifle Accelerometer

    The Spuhr mount isn't a requirement. I already had it so I designed my mount to fit. If you have a picatinny rail, you could make that work just as well!
  19. ammolytics

    Project: Inexpensive Rifle Accelerometer

    Thanks! I agree, it'd be great to see how the datasets compare. I'm sure the industrial-grade gear from B&K has a lot more capability than off the shelf components, though I don't want that to stop anyone from experimenting for themselves. I'm not planning on going to SHOT this year, otherwise...
  20. ammolytics

    Project: Inexpensive Rifle Accelerometer

    Sort of? My plan is to provide a place where people can share their data and compare it to others. Frankly, I'm bored by the siloed nature of most devices we see in the industry (chronographs, weather meters, etc), which people will copy to their computers to collect digital dust. I think...
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