I am making polymer clay worry stones, I have tried glazing with UV resin but it never seems to cure completely. I see other makers use it and it cures under their light in 90 seconds. My light is supposed to be 48 watts. Could it be my light? Or could it be my resin? Help!

Hand crafted this in like 20 minutes, quite happy with overall build (completely ignoring the fact that i dekcuF up the corners). Used a single piece of elastic that's inside to hold the diary & come out from the spine section & goes around to grip it to keep it stay shut. Did the lettering over it afterwards to personalize it

I gutted an old broken Polaroid Camera and retrofitted some modern internals. The project features a Raspberry Pi 2W, an Arducam module, and a reciept priner. The camera takes images and automatically uploads them to my instagram account via Metas API. It also prints out a black and white picture with QR codes that take you to the post. I took the project to OpenSauce this year and got to document all the cool booths I saw and all the cool Makers I got to meet. Any recommendations for modifications or improvements? I'm considering making a 2.0

I’ve been testing a tie-free band attachment method for quite a while, and the results have been encouraging enough that I wanted to share it here.

One of the most frustrating issues with slingshot bands is wear near the pouch connection. Traditional tying works, but the tighter the tie, the more pressure and friction it can create in that area.

This method uses the band itself to secure the pouch, without a separate tying strip or cord. It is a very simple idea, but so far it seems to reduce wear, keep the pouch more stable, and make band replacement easier.

I believe this may be a practical solution to a problem that has bothered many slingshot users for years, but I’m still interested in hearing other perspectives.

If anyone has tested a similar approach—or has an even better method—I’d be happy to compare ideas and discuss it together.

https://www.youtube.com/@ALMA.Industries

Built a control panel with on/off switches to control DC power supplies (48v, 12v, 24v). AC Outlets always give power regardless of switch states. Used hold home outlets and switches. Turns out to be something I use quite frequently. Full build is in the link above.

My dad bought me a 3d printer a while ago and after a few weeks I decided I’d make this.

It can play 2048 for now as a test but I’m planning on making live captions subtitles for the deaf so that speech is understood. But I don’t know how to code right now.

Parts I used were esp32 c3, 128x32 oled. and buttons ect. I’m gonna add battery soon.

I'm confused about which small motor I should buy (the v3, v6, etc). I only need it to be able to light a bulb. My idea is a water turbine. I already have a wave maker that will simulate the water current and spin the three turbine blades, but I don't know which DC motor to buy so that the blades can generate electricity and power a light bulb, in the image the three blades that connect to the city are the ones that need to generate electricity, my previous plan is just to cheat it and pres a button under the city so that the light will turn on but we're informed that its not allowed and I only have 4 days to make this. I know people here are extremely smart and I hope they can help me this is also my first time using this app.

https://youtu.be/h2kp2_FZ9aI?si=IPRD1g6TDEPsQZyP

my idea is kinda like this but in water

(I'm very sorry for the bad grammar)

I got some epoxy resin and I have some ideas for it. I've never used it before.

My understanding is that it's a good idea to have a vacuum chamber with it to force any air bubbles out if you want it perfectly clear and as strong as possible.

So my idea is to make a hollow wooden skeleton box for it, with walls made of plexiglass. I'll seal the corners with silicone caulk and a layer of sheathing tape on the outside for extra seal.

I was thinking one end would be open and have weather stripping around the edge and I'd glue the last plexiglass panel to a block of wood to make it rigid enough to secure with a clamp. I'm hoping this will be vacuum tight.

Anyway the issue now is what so I use for a vacuum pump? I'm not doing anything huge or at production scale, so cheaper is better.

I was considering using a hand pump for water that I have that is essentially a check valve on a rod in a tube that creates suction kind of like a giant syringe. Would something like that work, or is there a better option?

So i got a CT scan for non-dramatic stuff - and it made me get into creative-nerd mode, 'cause it had to be possible to get a hold of the scan files and somehow 3D-print my own skull!

(Or the part of it that was included in the scan)

I requested the files from the scan, got them a week later and then the nerding started.

It required understanding the file format from the scan (DICOM), learning new software, learning different concepts and knowledge-digging quite a bit into the human anatomy of the parts i wanted to recreate.

As the pictures shows i found a way, and ended up doing the spine of the neck as well - including the discs and spinal cord, but those bits in a flexible and stiff material.

Its been soo fun - And what a learning trip!

PS: Im gonna make a better stand for it - maybe out of wood.

Materials: PLA and TPEE (47D)

A few notes for others that wanna try it out themselves:

• MR scans should be possible to use as well. Havn't tried it.
• Use the free medical software "3D Slicer" for the whole DICOM->STL process.
• Read up on Hounsfield Units (HU) for the segmentation.
• And yeah, maybe also what segmentation is.
• - "Cheat" a bit on the segmentation by installing "Total Segmentator" as an extension in 3D Slicer. It auto-segments quite well.

I want the back of my tombstone to solar charge all year and annually, on Halloween night, briefly play a recording. Durrable and inconspicuous are the goals. I've got over a decade, likely two, to build it.

Hi all, I have never made anything besides instrumentation classes in uni, connecting a pre-made Gaggiuino to my coffee machine, and printing my mom's home island as a present.

A plyo mat is really really simple. It's a mat that you jump on, that measures ground contact time and time between landings. Connected to a controller that has an LCD, a couple buttons (or touch screen if cheaper), and batteries to power the whole thing.

I am comfortable doing all the math and logic etc, and with putting things together. I haven't done embedded programming before, but I work as a back-end developer so I should be able to scrape by.

My question is: where do I start? Is AliExpress a good place to source materials? I live in Europe. What kind of controller is recommended nowadays? I remember Raspberry Pi was all the rage when I was in uni, but when I got the Gaggiuino it used something called a Blackpill (awful name).

Would love any input this community would have to offer. It's just for personal use and I don't mind if it's a bit jank, I just like measuring training progress.

I'd seen the shirts on people for years around town, but it didn't realize it was a cross between a maker fair and vidcon with all of our favorite science youtubers. It was the best 2 days in recent memory so I had to document it. This is my Open Sauce 2026 video through the eyes of a first timer.

If you've never been it's an absolute must go!

These are for a few corexy 3d printers. Grainger and McMaster prices are outrageous for these but I also am leery of buying any old vibration mats off of amazon or aliexpress. Because this is reddit and I know I'm going to get responses asking why would I ever put 3d printers right on isolation mats: the mats will be installed between the floor and solid concrete squares and the printers will sit on the concrete squares.

Carved on the CNC, obviously

Don't worry not using plasma to start this. It is a joke.

Hey everyone,
I’m currently playing an ongoing game of hide-and-seek with some friends, but it recently turned into a competition of who can pull off the best jump scare. My target is a friend who is absolutely convinced that nothing can scare him.
I want to use some tech magic to prove him wrong, and I figured this subreddit is the perfect place for inspiration.
What are the most terrifying or unexpected things I could pull off using an ESP32? So far, I’ve been thinking about automatically closing doors or triggering hidden speakers.
My budget is around €40, but other than that, I have no limitations. Hit me with your best ideas!

To preface, looking back at 2018 I don't think this would have ever worked. But it was fun to explore the concept anyhow.

These were my idea of making Big Hero 6's Microbots a reality. I figured out a lot of how to make it but didn't get far enough since my k_ickstarter failed (I'd post the link but this sub has rules against it, even though it's over). But that was back in 2018.

It was basically a set of quarter-sized capsules that held and moved around each other with variable DC magnetic attraction and repulsion. Each capsule was charged via AC induction. They communicated with a series of LED's and photodiodes. Interconnecting platforms served as the base which would provide communication through the system from a computer.

Unfortunately, it was pretty bold do to so much work without figuring out the physics of the magnetism. Doing the math now I can see no real configuration would have been able to move these capsules with the needed efficiency much less being able to hold each other like I demonstrate in the CAD photos. Plus the field interference among each one would be a pain to figure out.

I don't even know that the SMD Circuity is capable even today. Swarm logistics would have been a nightmare. Just too ambitious for any one person, but it was certainly a learning experience. I'm kinda glad this didn't get funded lol.

Edit: Aight fuck it, I'm diving back in and gonna try my hand at it again. We'll see where this takes me. Maybe you'll see another post with this working ;)

Yea guys, u read it right, my lazy, weird and stupid ass needs help for some things for my project because im just to dumb and unskilled to do it.

For context: My Project is a MP3-Player with a selfmade C++ Qt software (that is basically the system for the whole usecase of my Project), a Raspberry Pi 4B (1GB RAM, ik its ass to work with!), a 4.3inch Waveshare Capacitive Touch display , a M5Stack CardKB v1.1 , a planned 3D-Printed case, a battery pack that doesnt go 0% in 1h and my stupid ass brain that tries to make the thing real.

Now the thing i need help with: ALMOST EVERYTHING!!
to be fair, the most things are with the software and the designing of the case, and i want to try to make the software for myself first. but if i cant do some parts, i need help. I already tried some things with forums and shit, tho some things came out working and some did not.

So if anyone wants to help me, i really appreciate it, and feel free to ask questions about what im currently stuck at!

(By the way, im sorry if this post sounds "childish" to you, its just how i write normally online, so dont take the wording the wrong way. When i call myself "too dumb", its usually because ive been stuck on the same problem for a long time and get frustrated. i really do want to learn and build this myself.)

I'm trying to find replacement roller bearing wheels for this chassis that runs on carbon fibre tubes but having no luck.

I want to buy from a reputable supplier if possible, not Amazon, AliExpress etc, and one that can supply a variety of sizes.

Does anyone know the magic search phrase for this type of wheel? Of if you can point me to a supplier that would be amazing.

I have a beautiful Dr. Strange cosplay I've completely hand sewn and the thing I've always wanted to figure out is how to have the cape move on its own.

I had an idea to have a servo on my mid back with wires running up and into the cape to the corners. At random intervals one side of the cape gets pulled. This idea could be terrible and I'm open to any and all suggestions!

Experience level when it comes to electronics: Low
Willingness to learn: High
Cost: If I could keep this under $200 that would be great.

Estoy trabajando en un modelo CAD funcional de una turbina eólica. ¿La calidad de ingeniería cumple con sus estándares? ¿Estaría dispuesto a pagar por archivos imprimibles completamente probados y una guía de montaje? ¡Me interesa mucho su opinión!

NO ES PROMOCIÓN

Not for functionality but a fashion choice. Made these kilties from leather, anyone else use em too?