02/16/2020 at 21:02 •
11/07/2019 at 16:36 •
Bit of a lag between updates, sorry. Going to be a bit slow, probably through the end of the year right now.
My current to-do list:
- Finish wiring new mainboard
- Integrate Radiation Watch board
- Build code for new MICS-6814 gas sensor and it's power regulator (get base 3 gas types working for now, will expand later)
- Figure out flex cable between main body and door
- Design labelling for the door panel touchpads and a unit label
10/01/2019 at 04:47 •
I finally have the 3d-printable design good enough to throw onto thingiverse and here and consider it 'good enough' to fully release.
(Here's the thingiverse link: https://www.thingiverse.com/thing:3796426 )
I've got the files zipped up and uploaded as 'OHI Science Tricorder V6 Chassis - Release ver.7z'
It's pretty easy to assemble, you just need a small handful of hardware besides the internal electronics. Specific parts and notes are in the Readme file.
08/24/2019 at 05:14 •
Gotten a lot further along with the 3d shell, the primary parts are at least mostly done and I'm working on test-printing and fine-tuning stuff now.
The big things left are getting the interface panels for the body and door further along. The main body panel needs cutouts for the TFT and controls, the door panel needs holes for the capacitive wire.
The mainboard simply slides into the body and the body's under part (violet-colored in the 3d model image) fixes it in place. The desing's working pretty well so far but it does need a lot of tweaking for ease of use and ease of printing.
Uploaded the current rev of the models as
08/08/2019 at 02:35 •
08/07/2019 at 06:15 •
After quite a while I've started to work on the next version of the Tricorder! I've had the hardware partially built for a while now but I'm starting to get the casing worked out in 3d so I (and anyone that wants to) can print it. It's going to take a lot of work since it's my first 3d design like this. Once I test it out and can make some changes I'll upload an STL and the original 123dx files.
01/15/2019 at 05:22 •
After a long lag I'm working on the hardware for the next version of the Tricorder!
It's not a huge change from the Version 5 to Version 6, more of cleaning up the current design that the Version 5 ended up with. The soldering work is about half done right now, I still need to finish up the sensor array, additional sensors and the door assembly.
The current Version 5 will have some of it's sensors moved to the V.6 (the GridEYE, 9-DOF/ATM, UV sensors) and everything else will be the same sensors in smaller breakout boards.
Changes with the Version 6:
- Slightly re-designed, a bit wider and shorter to allow a touch more room
- Different sensors for:
- Gas sensing, got the newer version of the sensor board
- LUX, IR sensors replaced with same IC but smaller breakout board
- This Feather M0 has a Packet Radio for if I make any hand scanners in the future, still unsure of that
Ultimately I want to keep the older version working, likely remaking the casing so I can fit bulkier sensors into it (like the shape of the TNG Medical Tricorder). Since both will be using the same Feather M0 boards I also want to write one firmware that will work on both units if possible.
Right now I'm focusing on the hardware and will resume on the code afterwords.
06/04/2018 at 22:58 •
Small update- Got a bit of work done on the code today, expanded the Radiation scan mode's functionality. Now it shows avg pulses/second, avg pulse strength (in uSv/h) along with the last pulse detected.
Part of this was making a timer based off of the RTC to count how long the scan mode has been on, this could be useful in other modes later on as well.
I also got a bit further on in building a framework to allow a more interactive UI. The ultimate goal is to have the ALT button switch the button pad's functionality to that of a D-PAD along with Confirm, Cancel and Back. This'll give me a lot more to work with, like highlighting scan elements or using a menu structure. A lot of work to do on this however...
The updated code has been attached to the project, v10.
04/13/2018 at 02:17 •
In the past year the external appearance of the unit hasn’t changed much, it’s all been internal hardware and code changes. As the photos show, the mainboard is getting to be a rat’s-nest of wiring with all of the changes and adaptation that I’ve done. The code, actually, is a lot cleaner than when I was at the same point last year. It’s able to do a fair bit more but isn’t using much more of the Arduino’s (Adafruit Feather M0 Adalogger) memory (still hovering around 30% at this point).
The sensors in the unit haven’t changed a huge deal, I’ve gotten them to work a bit better though and have even been able to adapt the libraries for the Gas sensor to work with the M0 controller (more brute-force really but it works). The total sensor list is posted below.
At the moment I’ve gotten 2 replacement sensor part. One to replace the Grideye sensor so it’s smaller (I can’t do surface-mount soldering yet) and one to replace both the atmospheric sensor board and the 9-depth-of-field sensor board that captures movement. The second will combine both the ATM and 9-DOF into one very small package, saving on the limited internal space within the Tricorder.
There are a few things I want to add into the unit so far: GPS (for both location data and accurate clock updates), Haptics (feedback from button presses, sensor alarms), and finding a replacement and higher quality display are my biggest. The largest hurtle right now is getting the code solid, using the display to give clear and accurate readouts of the sensor data, and eventually rebuilding the mainboard and chassis. The chassis’ ABS/aluminum/polycarbonate construction is rock-solid (it’s been hanging out in my camera bag for the last year) but I want to clean it up since the off-square lines in the current one bother me a bit.
My big inspiration for the project has been the Open Source Science Tricorder by Peter Jansen. It’s an incredible project and I have major respect to the creator.