Star Trek - Lost Era (Enterprise B) Tricorder

Iskelderon

Sr Member
We never got to see one in the movie and since I've always had a fascination with this unexplored era between Kirk's movies and TNG I'm designing my own one, based on an old 70s era walkie talkie.
The idea is to have something that bridges the gap between the mostly simplistic greebled movie tricorders Kirk's crew carried during the later movies and TNG's button & LED heavy tricorders with a sprinkle of some of Rick Sternbach's initial concept sketches before he progressed to the clamshell design we're all familiar with.
I've also attached some of the references I'm working from to show where this is heading.

TMP Ent-B Tricorder 001a.png

TMP Ent-B Tricorder 001b.png


20375882_10203784816539083_8864954478277346143_n.jpg
images.jpg

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ErLvt-VVoAEjnv3.png
 

13doctorwho

Sr Member
RPF PREMIUM MEMBER
I've thought about doing that concept tricorder very recently... very jealous that you're doing it!! Look forward to seeing what you come up with!!!
 

Iskelderon

Sr Member
I've thought about doing that concept tricorder very recently... very jealous that you're doing it!! Look forward to seeing what you come up with!!!
Thanks!
Well, my version is so far removed that you'd still create something distinct by doing something like the concept that's closer to TNG. Why not add it to your project list and in essence fill the gap between my tricorder and the one we know from TNG?

Parts split, still need to add the "towers" inside to mount the magnets that will hold the halves together.
TMP Ent-B Tricorder 002a.png
 

Iskelderon

Sr Member
Thanks!

Towers to mount the magnets are modeled, now I just need to get my filament printer to work again so I can get to the fun part with the electronics.
TMP Ent-B Tricorder 002b.png


[Update]The printer seemed to be in a friendly mood, now it's only a matter of time.[/Update]

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TMP Ent-B Tricorder 002c.png
 
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Iskelderon

Sr Member
First print turned out too thin and the fibers in the front/back surfaces didn't fully fuse.
Not sure if it's because I'm not used to working with PETG filament (Ender 3, printed at 230/70°C) or if it's a settings thing.
TMP Ent-B Tricorder 003a.png
 

Iskelderon

Sr Member
Had to rework the Shell to fit my new choice in components (preliminary list):
-18500 battery module (takes care of voltage regulation, charging and 5V and 3.3V output
-Arduino Nano
-DFPlayer for audio playback
-passive speaker
-magnets (3x1 round) to hold the shell together
-5V LED strip to provide backlights for the display
-white LEDs to blink/pulse

Any advice or alternative recommendations?

TMP Ent-B Tricorder 003shell.png
 

Iskelderon

Sr Member
Second PETG prototype at 240/80 came out clean, but the idiot that I am, I removed it right after the print instead of letting it cool down, deforming some of the edges. Here's to the third 20 hour print ...

Also used the opportunity to add a ridge that will reduce the amount of light leaking between the two halves.
TMP Ent-B Tricorder 003shell.png
 
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Iskelderon

Sr Member
I'm currently running into various problems printing the shell, so that will probably take some time to work out.
Either the material clogs up in the PTFE tube behind the nozzle (printing PETG at 245/70) or the edges of the print curl up from the print bed, making the parts unusable. I'm using an Ender 3 with upgraded electronics, if that makes a difference.

My original route for the electronics was to use a DFPlayer, but for some reason the damn things refuse to communicate via serial interface (yes, I even did the 1k Ohm stepdown trick, so the 5V Arduino Nano's commands won't fry the 3.3V player), so I've switched to a JQ6500-16p sound board instead.

I'm sure that's totally laughable, compared to the advanced things MangyDog does with his Voyager tricorder, but a guy has to start somewhere.
 

MangyDog

Sr Member
RPF PREMIUM MEMBER
Personally... id stay away from PETG for stuff like this. Its very resistant to chemicals and solvents which means paint would only go onto the surface and wont bond. Also PETG doesn't sand that well... for this kind of thing ABS is best. But is really tricky to print and design for. ESP without an enclosure and you have to try and take into account possible shrinkage.

PLA while mostly chemical resistant actually does go slightly soft with solvents and so bonds well with paints. But has the problem of self warping at 40c. IE in a hot car.

Also looking at the print preview, Id say flip them over. So you don't have to deal with any internal supports
 

Iskelderon

Sr Member
Thanks!
I've flipped the shell in the latest revision to reduce the amount of support to achieve just that. On the "flat" side there's a thin outer ridge, but still a lot less hassle.
Right now I'm printing a test in PLA to see if that works better. Twisted minds think alike and all that ... :D
TMP Ent-B Tricorder 003shell2.png
 

Iskelderon

Sr Member
Thanks!

In case anyone else wants to build something similar, I'm sharing the details.
Preview of the functionality so far:
#include <Arduino.h>
#include <SoftwareSerial.h>
#include <JQ6500_Serial.h>
#include <Grove_LED_Bar.h>

// Arduino Pin 8 is connected to TX of the JQ6500
// Arduino Pin 9 is connected to one end of a 1k resistor, which in turn is connected to RX of the JQ6500 to reduce 5V to 3.3V signal levels
SoftwareSerial mySerial(8, 9);
JQ6500_Serial mp3(mySerial);

//Grove_LED_Bar bar(6, 7, 0);
Grove_LED_Bar bar(7, 6, 0); // Clock pin, Data pin, Orientation

void setup() {
Serial.begin(9600);
mySerial.begin(9600);
mp3.reset();
mp3.setVolume(30);
mp3.setLoopMode(MP3_LOOP_ALL);
mp3.play();

bar.begin();
}

void loop() {
bar.setBits(random(1024));
delay(random(10,50));
}

Nothing fancy for the sounds, just "TNG Tricorder 1" from Trekcore, though with the silence at start and end stipped out using Audacity and its "Truncate Silence" filter.

[Update]Turns out, my hotend just croaked and the new one won't arrive until around the 21st.[/Update]
 
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