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140 stories total

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A Year of 3D Printing
4 months ago
- The author initially doubted the practicality of 3D printers due to past experiences with slow, expensive, and unreliable models.
- In 2025, they purchased a Bambu A1 Mini printer, which addressed previous issues with affordability, ease of use, and compact size.
- The author focused on printing functional items to avoid creating unnecessary waste.
- Examples of printed items include custom hooks, a magnetic bike helmet hook, a wavy hook for lanyards, and an Ortlieb pannier buckle replacement.
- Other useful prints include storage boxes, a cable wrap for a dehumidifier, an under-desk drawer, and stands for an Apple Watch and laptops.
- The Gridfinity modular storage system became a favorite for organizing drawers efficiently.
- Custom inserts for IKEA furniture and a durable bike bottle cage were also highlighted.
- Additional prints include an AirPod case, 3D maps as gifts, and organizers for board games.
- The author shared their material preferences (PLA for decorative items, PETG for durable parts) and recommended design software like OnShape and Fusion 360.
- They endorsed 3D printing for those who enjoy solving problems with custom, quickly produced solutions.
3D printing my laptop ergonomic setup
3 months ago
- The author discusses their ongoing project to create an ergonomic laptop setup using 3D printing, driven by personal health needs and a desire for perfection.
- Previous iterations of the setup had various issues, including difficulty in adjustment, weight problems, and durability concerns.
- The dream setup aims to be lightweight, durable, easy to adjust, and aesthetically pleasing, with features like accessory mounts and reproducibility for others.
- The first prototype was designed in OpenSCAD, printed in PLA, and later adjusted for PETG for better heat resistance. It includes a split keyboard and a vertical laptop slot.
- Challenges included print defects and the need for a locking mechanism for the keyboard sliders.
- The current version is lightweight (280 grams), durable, and quick to deploy, but still requires improvements like better rigidity and accessory mounts.
- Future plans include making the setup more modular and customizable, with potential open-source release of the design files.
- The project highlights the benefits of 3D printing for creating custom, accessible solutions to ergonomic challenges.
A Clever DIY Jig for Repeatable Lathe Work
3 months ago
- Alex Beloborodov is a custom furniture maker based in Tbilisi.
- He is new to turning but created a clever jig for making identical legs on a lathe.
- The jig provides real-time visual feedback by showing which parts of the blank need removal.
- Relevant pieces of the jig fall away as the profile is completed, signaling contour completion.
- Commenters note that similar tools like 'spindle dancers' and lathe tracer attachments already exist.
The Largest Zip Tie Is Nearly 4 Feet Long and $75
3 months ago
- Duct tape, WD-40, and zip ties are essential DIY tools.
- Zip ties are versatile and used even by NASA's Perseverance Mars rover.
- Cable Tie Link sells the world's largest and strongest zip tie, measuring 47 inches long and capable of holding up to 2,000 pounds.
- The oversized zip tie is marketed for industrial use, garages, shops, events, and creative builds.
- Despite their strength, the practicality of such large zip ties is questioned due to their size.
- The 47-inch zip ties are priced at $75 each, with bulk packs available for $799.99 (12-pack) or $1,699.99 (25-pack).
Tractor
3 months ago
- Completion of an electric tractor project after 6 months of work, designed as a toy for children and adults.
- Collaborative building experience with a 3-year-old, emphasizing the joy of creation and learning.
- Specifications include a 350W brushed DC motor, 36v Li-ion battery, solid rear axle, and pivoting front axle for uneven terrain.
- Steering system inspired by the Ferguson TE20, utilizing angle grinder gears for a homemade steering gearbox.
- Challenges and solutions in rear axle construction, including axle sizing and wheel attachment methods.
- Implementation of a reverse function using a DPDT switch due to motor controller limitations.
- Design and construction of the bonnet, inspired by a toy tractor, using kerf bending and plywood.
- Attempts to improve throttle response with an Arduino project, later deemed unnecessary and removed.
- Painting process described as tedious, with steps from disassembly to primer application.
- Reflections on welding techniques and adjustments to improve weld quality.
Generative Pen-Trained Transformer
3 months ago
- The Generative Pen-trained Transformer (GPenT) project was conceived to create a color-changing pen plotter with a coreXY-esque kinematic system.
- Initial plans included an SVG blob generator controlled by GPT-3.5, but the project was shelved due to other commitments.
- The project was revived with the goal of creating wall-mounted art for the author's apartment using a polargraph, a vertically-mounted drawing machine.
- The polargraph design involves two motors in the top corners, belts with counterweights, and a gondola for drawing, all hidden within a wooden frame.
- Detailed assembly instructions include gondola construction with bearings and servo for pen movement, and machine assembly with wooden frame and electronics.
- Electronics setup includes stepper motors, servo, endstops, and a Raspberry Pi for control, with wiring and firmware based on Marlin and Makelangelo software.
- A web interface, plotter.local, was developed for generating and controlling plotter-compatible gcode/SVG files, accessible via Raspberry Pi.
- Sonakinatography, a visual notation system by Channa Horwitz, was adapted for the plotter to visualize poems and phrases based on syllable counts.
- An attempt was made to train a text-to-gcode diffusion model (dcode), but results were limited due to latent space optimization for pixels, not gcode.
- The final GPenT implementation uses Gemini API to generate JSON commands for plotter control, creating varied and artistic outputs.
- The project successfully produced wall art, with a gallery of favorite plots shared by the author.
Werewolf Vflex Adapter Review
3 months ago
- The Werewolf VFLEX Adapter system provides power with less clutter compared to traditional bench power supplies.
- A real-world example involves reviving a Nikon Coolwalker with a dead EN-EL6 battery by using the VFLEX system to supply 6 volts.
- Jeff Geerling's review video on the VFLEX system influenced the purchase, highlighting its versatility for various devices.
- The VFLEX DIY Adapter is programmable, supporting devices like the Nikon Coolwalker, Brother Label Maker, ham radios, old laptops, and audiophile equipment.
- Programming the VFLEX involves connecting it to a computer or phone, navigating to vflex.app, and setting the desired voltage.
- USB-C PD specifications vary, affecting voltage negotiation capabilities depending on the power source.
- A suggested workflow includes setting the voltage via the app, connecting to a USB-C PD port, and using the appropriate adapter.
- Labeling pre-set VFLEX adapters could save time by eliminating the need for frequent reprogramming.
- Despite the cost, the VFLEX system is praised for its convenience and safety in powering various devices efficiently.
A method and calculator for building foamcore drawer organisers
3 months ago
- The author discusses the chaos in their Bisley chest of drawers and the need for an organization system.
- Foamcore is introduced as a material for making custom drawer organizers, described as two sheets of paper with dense foam in between.
- Necessary tools for working with foamcore include a sharp knife, hard edge, cutting mat, craft glue, and small pins.
- Steps for creating organizers: determine shapes needed, cut them out, and glue/pin them together.
- Tips for calculating panel sizes for boxes, considering foamcore thickness and the need for precise measurements.
- Variations of boxes include risers, stackable boxes, and boxes with dividers.
- The author built a calculator app to assist with measurements and reduce errors in cutting.
- Additional resources and communities for inspiration and advice on foamcore projects are mentioned.
So You Want to Build a Tunnel
3 months ago
- Homemade tunnels are gaining popularity, with creators like Colin Furze and 'Tunnel Girl' documenting their projects online.
- Underground construction is dangerous and poses unique engineering challenges, requiring careful planning and safety measures.
- Land ownership extends below the surface, making trespassing a concern even for underground tunnels.
- Building codes and permits are essential for tunnel projects to ensure safety and legal compliance.
- Geology significantly impacts tunnel design and construction methods, with different soils and rocks requiring specific tools and supports.
- Temporary and permanent supports, such as shields and concrete linings, are crucial for tunnel stability.
- Excavation spoils (waste material) present a major logistical challenge in tunneling projects.
- Water management and ventilation are critical for maintaining safe and functional tunnels.
- Fire safety and egress routes must be considered in tunnel design to protect occupants.
- Hobby tunneling carries risks but can be rewarding with proper planning and adherence to safety practices.
Project Aura: ESP32 Air quality monitor
3 months ago
- Project Aura is an ESP32-based DIY air quality monitor with a touchscreen display and industrial sensors.
- It integrates with Home Assistant and uses off-the-shelf components without soldering.
- Key components include Waveshare ESP32-S3-Touch-LCD-4.3, Sensirion SEN66, and Adafruit sensors for PM levels, CO2, VOC, NOx, temperature, humidity, and optional formaldehyde detection.
- Firmware features a touch UI with LVGL, local web setup, MQTT support, and multi-language options.
- Requires PlatformIO CLI or VSCode + PlatformIO extension for firmware installation.
- Alternative open-source option: AirGradient ONE Kit with ESP32-C3 and smaller OLED display.
- Available as a DIY build (approx. $200) or pre-assembled (139-189 Euros), currently out of stock.
- Crowdfunding campaign on MakerWorld offers STL files, assembly guide, and web installer access for $25.
Simple Screw Counter
2 months ago
- The author discusses their precision clock kits and the anxiety they feel about making mistakes.
- They dreamt of automating the process of counting nuts and bolts, leading to the creation of a laser-cut acrylic dispenser.
- The dispenser uses scrap PLA filament for pegs, with a press-fit design due to the conical kerf of the laser.
- A hopper was designed to hold over a hundred nuts, with considerations for size and functionality.
- The author experimented with a screw dispenser, addressing issues like jamming and incorrect bolt orientation.
- A ramp was added to ensure bolts drop correctly into the slot, improving the dispenser's reliability.
- The design includes a trigger mechanism to block additional screws from falling through when dispensing.
- Tracks were designed to hold over 150 screws, with considerations for visibility and ease of use.
- The author reflects on the design's limitations, such as underutilized track space and the need for a one-way valve.
- Alternative designs, like an S-shaped track, were considered but deemed unnecessary for the current project.
- The final design is lightweight, easy to hold, and functional, though the hopper could be larger.
- The author mentions using OnShape for design but criticizes its cloud-based model and limited free tier.
- They express hope for FreeCAD's future success despite its challenges.
DIY YouTuber powers an EV using 500 disposable vapes
2 months ago
- DIY YouTuber Chris Doel powers a mini EV using a battery pack made from 500 used vapes.
- The project aims to highlight the environmental impact of disposable vapes, with over a million discarded daily in the UK.
- Chris repurposed a previously built 50V battery pack for the EV, originally used for home backup power.
- The EV, a Reva G-Wiz, required minimal configuration, including inverter reprogramming to match battery output.
- The setup achieved 17 miles (27 km) of range and a top speed of 35 mph (56 kph).
- The battery pack maintained temperatures below 30°C (86°F) and delivered 2.07 kWh of usable energy.
Neither Android nor iOS: DIY Smartphone Runs on ESP32
2 months ago
- [LuckyBor] has created a homemade 4G smartphone using an ESP32-S3 and a simcom modem, capable of calling, texting, and web browsing.
- The phone features a 3.5″ touchscreen, a 3.5 mm audio jack, and an OV2640 Arducam module for taking pictures.
- Currently in alpha, the phone is a brick of layered modules, but [LuckyBor] plans to slim it down with a four-layer PCB and open-source the design.
- The final version will include an SD-card adapter and support for user-installed apps via MicroPython.
- The project aims to provide an open and private smartphone experience, contrasting with commercial phones that may have backdoors or spyware.
- Discussions around the project highlight the potential for simple, open-source programs on such a platform, free from data collection.
- The phone's replaceable battery and SD card support are noted as desirable features missing in many commercial phones.
- The project is seen as a step towards reclaiming ownership and control over personal technology.
48x32, a 1536 LED Game Computer
2 months ago
- Children are addicted to gaming devices, but the school mandates their use.
- Instead of stopping consumption, the focus shifts to creation.
- Creating on smartphones or laptops is challenging due to competition and complexity.
- Old games can compete on fun factor and are easier to create with Arduino.
- A 32x8 LED display was used, but expanded to 48x32 for better gameplay.
- A lasercut enclosure was made for the display with precision.
- Joysticks were 3D printed and fitted perfectly on the first try.
- An Arduino R4 was used as the computer component.
- A version of the Nokia 'Snake' game was created with simple LED graphics.
- Future plans include sharing software details and how to make simple games.
Billy bookshelves as a retro motherboard "rack"
2 months ago
- IKEA's BILLY bookshelves can hold Baby AT and Micro ATX motherboards.
- Boards can be placed on corkboards or mouse pads for easy access.
- Expansion cards can remain installed, saving setup time.
- Shelves have space for drives and cables, with glass doors to protect from dust and bumps.
- PicoPSU power supplies in ISA slots could allow boards to be used directly on shelves.
- Potential setup includes a KVM to manage IO from multiple boards to a desk.
- Plans to create an ASCII art diagram of the setup.
Show HN: Curiosity – DIY 6" Newtonian Reflector Telescope
2 months ago
- Madhav and Swarup built a 6" Newtonian Reflector Telescope named 'CURIOSITY' inspired by clear skies in Bengaluru and online resources.
- Key calculations for the telescope include focal length (900mm), tube inner diameter (190mm), and focuser height (96mm), adjusted for focuser size.
- Materials used include a PVC tube (190mm inner diameter, 200mm outer diameter, 1000mm length), a telescope kit from Tejraj and Co., and matte black spray paint.
- CAD modeling was done using Fusion 360, with components like the primary mirror assembly, secondary mirror with spider vane, and optical tube assembly (OTA) designed and 3D printed.
- The OTA cradle and rocker box were inspired by Stellafane's Guide, made from plywood, and assembled with aluminum L brackets and self-tapping screws.
- Light Gathering Power (LGP) for the telescope is 625 times more than the human eye, allowing observation of stars up to magnitude 13.5.
- The telescope has a focal ratio of f/6 and magnification of 36x with a 25mm eyepiece and 100x with a 9mm eyepiece.
- The Dobsonian mount, named after John Dobson, is a low-cost, manual tracking mount, while equatorial mounts offer motorized tracking for easier navigation of sky objects.
FrameBook
2 months ago
- The author retrofitted a first-gen MacBook from 2006 with modern components, inspired by similar projects.
- Key steps included sourcing parts, disassembling the MacBook, and replacing internal components with new hardware like a Framework mainboard.
- The project involved soldering for the first time, 3D printing custom parts, and creatively mounting new I/O ports.
- Challenges included adapting the original keyboard/trackpad, creating a glowing Apple logo, and fitting a new display and webcam.
- The final product, dubbed 'Framebook,' took about 3 months to complete and was a learning experience in soldering and 3D modeling.
Rack-Mount Hydroponics
2 months ago
- Started growing lettuce in a spare server cabinet due to having extra space and a desire to reduce computer usage.
- Used a flood and drain (ebb and flow) hydroponic system with rockwool, perlite, and clay balls as growth mediums.
- System involved short, frequent flood cycles to wet plant roots, with adjustable drainage to prevent overflow.
- Encountered challenges like floating pots, solved by adding sterilized rocks for weight.
- Initial setup included 18 hours of light and 4 flood cycles daily, adjusted to 2 cycles based on plant needs.
- Used a mystery NPK 12-12-36 fertilizer without dosage info, starting with 20g for 30L of water.
- Successfully grew lettuce and herbs, with minimal issues like water leakage occurring twice.
- Project was more successful than expected, providing learning experiences and fresh salads despite its unconventional approach.
Boomloom: Think with your hands
a month ago
- The loom is designed for intuitive learning by doing.
- Features a top bar that separates warp threads for easy plain weave like tapestry.
- Allows for complex patterns similar to a 4-shaft loom without technical steps.
- Five bars enable different weave structures with endless variations for beginners and experts alike.
- Compact, lightweight, and stackable design suitable for homes, studios, and classrooms.
- Encourages creativity and learning without the need for prior experience.
- Customers praise it as a 'wholesome addiction' and 'pure genius'.
- Comes with a no-risk guarantee: free returns within 60 days if not satisfied.
- Active community on Instagram @boomloomstudio for support and inspiration.
Digitizing photos from the 1998 Game Boy Camera
a month ago
- The author, a retro game collector, fulfilled a childhood dream by acquiring the 1998 Game Boy Camera and its printer accessory, noting its charmingly low-quality photos.
- Photos were limited to 30 in-game, requiring the Game Boy Printer for more, which produced small, thermal-printed images that faded over time, compounded by scarce and expensive compatible paper rolls today.
- To digitize photos, the author used the open-source Arduino Gameboy Printer Emulator (V3), developed by Brian Khuu and Raphaël Boichot, which emulates the printer by decoding its protocol via Arduino.
- The printer protocol involves bytes for sync, command, compression, data length, payload, checksum, device ID, and status, with commands like Initialize, Data, Print, or Inquiry.
- Instead of modifying cables, the author soldered a PCB designed by Raphaël, which worked on the first try, extracting raw photo data that can be converted to images using community tools.
- The Game Boy Camera Gallery tool allows direct serial reading from a browser, enabling photo extraction without Arduino logs and offering color palette customization to match different Game Boy models.

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#diy

A Year of 3D Printing

3D printing my laptop ergonomic setup

A Clever DIY Jig for Repeatable Lathe Work

The Largest Zip Tie Is Nearly 4 Feet Long and $75

Tractor

Generative Pen-Trained Transformer

Werewolf Vflex Adapter Review

A method and calculator for building foamcore drawer organisers

So You Want to Build a Tunnel

Project Aura: ESP32 Air quality monitor

Simple Screw Counter

DIY YouTuber powers an EV using 500 disposable vapes

Neither Android nor iOS: DIY Smartphone Runs on ESP32

48x32, a 1536 LED Game Computer

Billy bookshelves as a retro motherboard "rack"

Show HN: Curiosity – DIY 6" Newtonian Reflector Telescope

FrameBook

Rack-Mount Hydroponics

Boomloom: Think with your hands

Digitizing photos from the 1998 Game Boy Camera