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Author Archives: Donald Papp

Reservoir Sampling, or How to Sample Sets of Unknown Size

Posted on July 3, 2025 by Donald Papp

Selecting a random sample from a set is simple. But what about selecting a fair random sample from a set of unknown or indeterminate size? That’s where reservoir sampling comes …read more Continue reading Reservoir Sampling, or How to Sample Sets of Unknown Size→

Posted in interactive, reservoir sampling, sampling, Software, software hacks, Statistics

Turbine Blower 3D Prints Every Part, Including Triple Planetary Gears

Posted on June 29, 2025 by Donald Papp

There was a time when print-in-place moving parts were a curiosity, but [Tomek] shows that things are now at a point where a hand-cranked turbine blower with integrated planetary gears …read more Continue reading Turbine Blower 3D Prints Every Part, Including Triple Planetary Gears→

Posted in 3d printed, 3d Printer hacks, blower, planetary gears, tool hacks | Tagged Turbine

Minecraft Clone Manages With Nothing But HTML + CSS

Posted on June 25, 2025 by Donald Papp

Can a 3D Minecraft implementation be done entirely in CSS and HTML, without a single line of JavaScript in sight? The answer is yes! True, this small clone is limited …read more Continue reading Minecraft Clone Manages With Nothing But HTML + CSS→

Posted in css, html, Minecraft, software hacks

Spiral Connector Makes Fastener-Free Assemblies

Posted on June 20, 2025 by Donald Papp

[Anton Gaia]’s SPIRAL sculpture resembles an organizer or modern shelving unit, but what’s really interesting is how it goes together. It’s made entirely from assembling copies of a single component …read more Continue reading Spiral Connector Makes Fastener-Free Assemblies→

Posted in 3d printed, classic hacks, Golden Ratio, golden spiral, spiral | Tagged Art, Sculpture

Dual RGB Cameras Get Depth Sensing Powerup

Posted on June 19, 2025 by Donald Papp

It’s sometimes useful for a system to not just have a flat 2D camera view of things, but to have an understanding of the depth of a scene. Dual RGB …read more Continue reading Dual RGB Cameras Get Depth Sensing Powerup→

Posted in depth camera, depth sensor, digital cameras hacks, dual RGB, Machine Learning, point cloud

Flopped Humane “AI Pin” Gets an Experimental SDK

Posted on June 19, 2025 by Donald Papp

The Humane AI Pin was ambitious, expensive, and failed to captivate people between its launch and shutdown shortly after. While the units do contain some interesting elements like the embedded …read more Continue reading Flopped Humane “AI Pin” Gets an Experimental SDK→

Posted in ai, Artificial Intelligence, assistant, humane, Reverse-engineering, wearable hacks

Tune In to “Higher Lower”, the Minimal Handheld Electronic Game

Posted on June 4, 2025 by Donald Papp

[Tommy] has a great write-up about designing and building a minimalistic handheld electronic game called “Higher Lower”. It’s an audio-driven game in which the unit plays two tones and asks …read more Continue reading Tune In to “Higher Lower”, the Minimal Handheld Electronic Game→

Posted in 3d printed, Arduboy, arduino, Arduino Hacks, diy, games, handheld, kit

Add Wood Grain Texture to 3D Prints – With a Model of a Log

Posted on June 3, 2025 by Donald Papp

Adding textures is a great way to experiment with giving 3D prints a different look, and [PandaN] shows off a method of adding a wood grain effect in a way …read more Continue reading Add Wood Grain Texture to 3D Prints – With a Model of a Log→

Posted in 3d printed, 3d Printer hacks, how-to, texture, wood grain

This BB Shooter Has a Spring, But Not For What You Think

Posted on June 2, 2025 by Donald Papp

[It’s on my MIND] designed a clever BB blaster featuring a four-bar linkage that prints in a single piece and requires no additional hardware. The interesting part is how it …read more Continue reading This BB Shooter Has a Spring, But Not For What You Think→

Posted in 3d printed, bb, detente, four bar linkage, print in place, shooter, toy hacks

A Simple Tip for Gluing Those LED Filaments

Posted on May 29, 2025 by Donald Papp

[Boylei] shows that those little LED filament strips make great freeze-frame blaster shots in a space battle diorama. That’s neat and all, but what we really want to highlight is …read more Continue reading A Simple Tip for Gluing Those LED Filaments→

Posted in diorama, led, LED filament, led hacks, shrink tubing | Tagged Glue

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