3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: or [email protected]
There are CAD communities available at: [email protected] or [email protected]
Rules
-
No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
-
Be respectful, especially when disagreeing. Everyone should feel welcome here.
-
No porn (NSFW prints are acceptable but must be marked NSFW)
-
No Ads / Spamming / Guerrilla Marketing
-
Do not create links to reddit
-
If you see an issue please flag it
-
No guns
-
No injury gore posts
If you need an easy way to host pictures, https://catbox.moe may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
Moderation policy: Light, mostly invisible
view the rest of the comments
This is pretty cool.
This is the how-they-done-it paragraph. Essentially, they printed mechanical logic gates by taking advantage of a conductive filament that grows/shrinks as it heats and cools. Cool!
So this is a 3D printed PTC thermistor. Very cool and potentially extremely useful for measuring temperatures within a housing which has never before been able to be done to my knowledge. This is potentially awesome for embedding in medical devices which by regulations cannot be above a specific temperature while in contact with the body.
That said, there is nothing "active" about it. Thermistors are, by definition, passive electronic components. Actives amplify, rectify, or supply electric energy while passives consume, store, and release supplied energy.
$2.15/g, oof ouch owie
Of course that's insanely expensive compared to our economy packs of standard PLA, but consider how much conductive filament one would need in comparison to normal filament for a project.
I'm aware that everything is in the realm of hypotheticals and prototypes, but even if the final product is significantly more expensive than standard filament, it's not like you'll need to be able to print entire parts out of it, just the electric traces.
I don't see this being practical beyond a "neat" any time soon. Because it relies on thermal expansion and contraction it won't be very fast to cycle. It's also physically pretty long/wide, so a more traditional IC or microcontroller would likely be a better choice unless it's super thin.
This is still cool, but I am failing to see a practical application.
If/when they're able to print transistors it will be a lot more interesting.
What if you just put some fans on it to keep it below 40? It could become more reliable at the expense of requiring a bit more cooling.
Oh, I agree completely. I don't think the tech as-is should be being priced at all. What I'm saying is, even if this product does come to fruition, it likely will still be incredibly expensive compared to normal filament, but the amount one would need to use in a project is very small comparatively.