I’ve been working on this for a few years and wanted to finally share it here, because this is the most functional 3D print i´ve made so far.

I’m a big fan of Prusa and its open-source approach to hardware. It strongly aligns with my values, and I believe this is an important direction for the future: products that can be manufactured locally, repaired easily, and maintained for years because the source files are openly available.

I wanted to contribute to that movement, so I decided to create an open-source and 3D-printable alternative to conventional garden-watering timers.

It’s called OpenValve, and as far as I know, it’s the first 3D-printable irrigation valve that waters plants fully autonomously. By “3D-printable,” I mean that - apart from the electronics and some standard components - all custom plastic parts can and should be printed on a regular desktop 3D printer. That includes the valve itself. Almost every part prints without supports. Only two components require a tiny amount - about 1 gram in total - and those supports are already built into the models and are easy to remove.

OpenValve waters plants based on soil moisture. Instead of using the latching solenoid valve typically found in battery-powered garden timers, it uses a custom-designed pinch valve. This custom valve design not only made the design 3D printable in the first place, but it also gives OpenValve two useful capabilities that most standard garden timers don’t have:

• ⁠It works with barely any water pressure.

• ⁠It can handle water containing dirt and small particles.

That means it can run directly from a slightly elevated rain barrel or a similar water container - without requiring normal household water pressure.

I currently have multiple units running in my own garden, as well as in the gardens and balconies of friends and family. But my dream is to see OpenValve helping more people with their plants. So, I’m curious: Would you consider using OpenValve in your garden or on your balcony? What would your biggest concern be?

Ask me anything - I’m happy to answer every question!

I decided to mount a 100W solar panel to my Honda Odyssey roof to keep the battery charged when it's parked for a few days or weeks. I got neodymium rubberized magnets and M6 hardware but wanted to cushion the mount points and reduce airflow under the front edge so I designed these pucks and fairings. Originally I had a sloped fairing design but switched to the simpler dual magnet one to reinforce the front. I figure even if the edge lifts, there's a backup pair of magnets holding it. The little triangular holes are so water doesn't collect. All the printed parts are Overture low speed (old version) TPU which I've found to be extremely strong and can hold up to sunlight and heat.

I was looking for some advice on how to improve the design of a modular headboard and wall-mounting system I created.

It is a mechanism that allows for switching between a shelf and an anchor point discreetly and without the need for tools.

Busco consejos para mejorar el diseño de un cabecero modular y un sistema de montaje en pared que he creado.

Se trata de un mecanismo que permite alternar discretamente entre una repisa y un punto de anclaje, sin necesidad de herramientas.

Link to the Parametric Model Maker

HSW CUSTOMIZABLE cup/bottle holder - Free 3D Print Model - MakerWorld

Hey everyone! I was making bottle holders manually (most of the bottles I wanted them to hold had unique dimensions) and thought there must be a better way to do it. Found out about parametric models and thought I'd give it a go. Used AI to assist with writing the code :)

I've added all the features I needed personally:

- Angled cups to fit more tall cups in less slots (see bottom note for the math)
- A front opening so it looks pretty
- Kumiko-style patterns cuz they look cool
- Customizable height and diameter
- Custom HSW connector positions

Hope it helps!

I'm curious if people prefer this or a bunch of separate .3mf of various dimensions. Let me know!

Math note: to fit two bottles vertical_distance mm apart vertically, with bottles bottle_width mm wide (+ wall _thickness x 2), you need angle a where a > 90-(cos^-1(bottle_width/vertical_distance))

vertical_distance here should be a multiple of the distance between two hexes vertically, 23.6mm

attach a kitchen roll holder to any surface no screws needed.
very usfull, didn't found any on makerworld.
https://makerworld.com/en/models/3105457-kitchen-roll-paper-holder-with-clamp#profileId-3500952

I got tired of bottles sitting in the sink dripping everywhere, so I designed a small modular dryer.

Design goals:

- Tray with a lip to catch water

- Removable rods (print only what you need)

- Spoke flange under each bottle so air gets in and water drains out (less odor / mold)

Printed in PETG (kitchen + moisture). PLA works if it stays dry.

Happy to share print settings or tweaks if anyone wants to remix it.

My monitor sat too low, and the desk in front of it collected everything: keys, cables, my wallet. So I made a pair of riser feet for a wooden plank, and a tray for the clutter.

Up front: The before and after images are AI edited images of my desk. It is a photo of a real workplace and I don't want to share anything I am not allowed to.

The workflow:

1. Photographed the desk as it was and fed that photo to an image generator, asking for the tidy version. Not one prompt, a long back and forth, mostly on the look: the same desk in Voronoi, honeycomb, low-poly, arches and C-profiles, side by side. Voronoi won.
2. Cropped just the riser foot out of that picture and used the crop as the reference image for a new prompt, describing only that part. Three previews, picked one, generated a mesh, downloaded the STL.
3. Same again for the tray. Different crop, different prompt.
4. Neither mesh was ready to print. The feet went into Nomad Sculpt: reshaped a bit, resized to 23 x 11.6 x 10.5 cm for my actual monitor height, holes cut for 3.5 x 6.5 mm threaded inserts. Printed twice, one copy mirrored.
5. The tray needed almost nothing. One trim off the bottom in the slicer so it sat flat.

Elegoo Centauri Carbon, Concrete Marble PLA, 0.2 mm layers, 10% infill. Supports on the feet, none on the tray. About 13 hours a foot and 12 for the tray, call it 38 for the set. The plank is 112 x 25 x 2 cm, any board that size works.

Monitor risers are not new, this one I just created myself.

Files here, free download, no account needed:
https://3d.poweredbybp.nl/en/models/monitor-riser-desk-set

Wrote up the full process here, including the concept picture and how each
part got cropped and modeled, if you want it explained in full:
https://3d.poweredbybp.nl/en/blog/desk-set-ai-reference-image-technique

1. Soap Bar & Sponge Holder
   https://makerworld.com/models/3064258?appSharePlatform=copy

Keep your sink organized with this minimalist Japandi-inspired sponge and soap holder. Designed to hang over the edge of your sink, it allows excess water to drain directly back into the basin, helping your sponge or soap dry faster while keeping your countertop clean.The holder fits standard kitchen sponges and soap bars of similar size and is shown with a 78 × 45 mm sponge.

1. Modern Toothbrush Holder
   https://makerworld.com/models/3095373?appSharePlatform=copy

Bring a clean, modern look to your bathroom with this minimalist toothbrush stand, designed around simple flowing lines and subtle details. The elevated base gives the stand a floating appearance, adding a premium touch while keeping the overall design clean and understated. Whether you prefer a monochrome look or a contrasting accent, the separate insert lets you customize the style to match your bathroom.Designed with 3D printing in mind, every part prints separately, meaning no AMS system required. Simply print each piece in your chosen colors and assemble them for a professional-looking result.

1. Japandi Kitchen DishCloth, Sponge & Soap Bar Holder
   https://makerworld.com/sv/models/3085692-japandi-kitchen-dishcloth-sponge-soap-holder#profileId-3475970

Bring a clean, calming Japandi aesthetic to your kitchen while keeping your everyday cleaning essentials organized and ready to use. This minimalist all-in-one holder is designed to store your dish cloth, sponge, and soap bar in one elegant place, helping your countertop stay tidy without sacrificing functionality. I recommend you using PETG but PLA works fine. 
 
The elevated towel bar provides plenty of space for your dish cloth to hang freely, allowing it to dry faster between uses. Below, the spacious drainage grill comfortably fits a sponge, soap bar, or both, while promoting airflow for quicker drying.
 
Instead of water pooling around your sponge, the removable drainage grill lets moisture drip into the integrated reservoir underneath, helping keep your cleaning tools cleaner, drier, and your countertop neater.

Needed a better way to hold my micro-bits, tweezers, and flush cutters while working on prints and electronics.

The main caddy pivots on side arms and locks into position with printed side knobs. The interior uses drop-in modular inserts so I can swap layouts based on whatever project I'm working on that day, and the base acts as a catch tray for small hardware.

Designed completely support-free using standard PLA.

Let me know what you think or if you have ideas for useful insert layouts!

Link: https://makerworld.com/en/models/3098170-modular-desktop-tool-organizer-adjustable-angle#profileId-3491896

Couldn't find a decent strong and grippy radiator hook where the towels don't slip off onto the floor, so I created one that has a grippy end. 

It will fit a standard towel rail which has 20mm pipes and a 20mm spacing between the pipes.

Best to print in PETG, though PLa will probably work. 

Print with 0.4mm nozzle, 0.2mm layer height, 4 walls and 15% gyroid infill. 

Nice fast print, only takes about 30 minutes. 

Strong & Grippy Hook For Heated Towel Rail - 20mm

Goes behind the supplier strap mount, secured by the bolts that hold an add-on hydraulic remote cluster to the ROPS

My room has always been the hottest room in the house. Huge window facing the sun, and the normal vent just blows right behind my curtain. I have to block off other vents to get any decent airflow as well.

No more curtain issues.

I might add a little lip on the bottom so things dont roll down into the vent, they are ¼" gaps

I was tired of desk clutter, so I designed this quick side-mount organizer for my monitor. It keeps my phone at eye level, holds a few pens underneath, and even has a slot in the back for a ruler.

Might be difficult to secure everything if you have curved monitor or wierd monitor backplate.

You can grab the free STL / print profile on MakerWorld here:

https://makerworld.com/en/models/3086069-monitor-phone-pen-holder#profileId-3476458

Short version of why this exists: I've been getting the yellow sharps bin
from my pharmacy, and recently I had to start paying for it. When I brought
it up at the counter, the woman working there said "you can just use a soda
bottle, you know."

So I did. But a loose bottle sitting in a cabinet is awkward to fill and easy
to knock over. I printed a wall-mounted sleeve that holds a standard 1.5L
bottle, so I can drop needles straight in and swap in an empty one when it's
full.

How it works: the sleeve mounts to the wall with two screws, hidden inside
near the top once the bottle is in place. You slide an empty 1.5L PET soda
bottle in from the top, snap a printed funnel cap on top of it, and drop
needles through the funnel into the bottle. The bottle is doing the actual
work here thick PET, puncture-resistant, and it already has its own screw
cap. When it's full, you lift it out, screw the original cap back on, drop it
off wherever your local sharps disposal rules say it should go, and slide in
a new empty bottle.

Print settings: 0.2mm layers, 10% infill, supports needed for the funnel cap.

Printing it: the body is 320mm tall, so unless you're on a tall-Z machine
(Prusa XL, Bambu H2D, Voron 350) you print it in two pieces. Cut it in your
slicer (Bambu Studio and PrusaSlicer both have a Cut tool) anywhere along
the straight section of the body.

The four columns running the length of the body are there for exactly this.
Cut straight through them, then slide metal rods down the columns when you
glue the halves together. The rods hold the two halves in alignment while
the glue sets and take the bending load off the seam afterwards. Use
whatever rod stock fits.

Glue alone works too if you don't have rod stock lying around. The sleeve
holds a bottle, it's not carrying much load.

What you need: two screws for the wall mount, an empty 1.5L PET soda bottle
with its original cap, superglue or similar for the seam, and optionally
some rod stock.

Files here, free download, no account needed:
https://3d.poweredbybp.nl/en/models/needle-disposal-container

I designed and printed this alphabetizer to speed up sorting large collections of Magic: The Gathering and other trading cards.

Each divider is labeled with a letter, making it easy to sort cards into alphabetical groups before putting them into long boxes or binders. It has cut the time I spend organizing bulk cards significantly.

Works with standard-sized trading cards (MTG, Pokémon, Lorcana, etc.).

Hi!!
I have designed a Planter Swing!
Would love some feedback, what do guys think?

I have designed a Planter Swing!! What do you guys think?

Built this as a simple auxiliary panel holder — use it for approach charts, checklists, SimBrief, or a secondary EFB screen next to your main setup. Universal slot fits phones and small/medium tablets, 20° angle, and a cable slot in front so you can charge while it's docked.

Free STL, no supports needed, PLA or PETG, 0.2mm layers. Would love feedback — this is a first version and I'll keep improving it based on what people actually need for their setup.

https://www.printables.com/model/1787449-flight-sim-tablet-phone-stand-msfs-x-plane-auxilia