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Author Archives: Donald Papp

Gaze Inside These Nanopower Op-Amps

Posted on June 5, 2022 by Donald Papp

[Robo] over at Tiny Transistor Labs has a fascinating look at what’s inside these modern, ultra low-power devices that consume absolutely minuscule amounts of current. Crank up the magnification, and …read more Continue reading Gaze Inside These Nanopower Op-Amps→

Posted in closeup, decapping, LPV801, LPV821, nanopower, op-amp, parts, Reverse-engineering

DIY Keyboard Can’t Get Much Smaller

Posted on June 4, 2022 by Donald Papp

The PiPi Mherkin really, really can’t get much smaller. The diminutive keyboard design mounts directly to the Pi Pico responsible for driving it, has a similar footprint, and is only …read more Continue reading DIY Keyboard Can’t Get Much Smaller→

Posted in Keyboard, macropad, micro, mini, peripherals hacks, pi pico, Raspberry Pi Pico

3D Printed Flexture Shows Precision in Action

Posted on June 3, 2022 by Donald Papp

Here’s an older but fantastic video that is as edifying as it is short. [Topias Korpi] demonstrates a 3D printed flexture with a dial indicator on one end, and an …read more Continue reading 3D Printed Flexture Shows Precision in Action→

Posted in 3d printed, dial indicator, flexture, levers, parts

3D Printed Protection Against “Under-Door” Attacks

Posted on June 3, 2022 by Donald Papp

“Under-door” style attacks are when an attacker slides a tool through the gap underneath a door, hooks the interior handle from below, and opens the door by pulling the handle …read more Continue reading 3D Printed Protection Against “Under-Door” Attacks→

Posted in 3d printed, hotel security, physical security, security hacks, under-door attack

Laser-Engraving Hairlines: When a Line Isn’t a Line

Posted on May 30, 2022 by Donald Papp

When is a line not a line? When it’s a series of tiny dots, of course! That’s the technique [Ed Nisley] used to create a super-fine, colored hairline in a …read more Continue reading Laser-Engraving Hairlines: When a Line Isn’t a Line→

Posted in hairline, laser engrave, laser hacks, retrocomputing, slide rule, tektronix

Adjustable Workholding for Honeycomb Tables, With a Bit of DIY

Posted on May 29, 2022 by Donald Papp

Honeycomb tables are often found on laser cutters, where they provide a way for work material to be laid flat while not interfering with things like airflow. This leads to …read more Continue reading Adjustable Workholding for Honeycomb Tables, With a Bit of DIY→

Posted in honeycomb table, laser hacks, offset pins, tool hacks, workholding

Annotate PDFs on Linux with PDFrankenstein

Posted on May 29, 2022 by Donald Papp

On Windows and Mac machines, it’s not too troublesome to add text or drawings (such as signatures) to PDF files, but [Mansour Behabadi] found that on Linux machines, there didn’t …read more Continue reading Annotate PDFs on Linux with PDFrankenstein→

Posted in annotate, editing PDF, inkscape, linux, linux hacks, PDF, qpdf

AI Attempts Converting Python Code to C++

Posted on May 28, 2022 by Donald Papp

[Alexander] created codex_py2cpp as a way of experimenting with Codex, an AI intended to translate natural language into code. [Alexander] had slightly different ideas, however, and created codex_py2cpp as a …read more Continue reading AI Attempts Converting Python Code to C++→

Posted in ai, Artificial Intelligence, C, code conversion, Codex, Machine Learning, OpenAI, Python, software development

Bi-Color Filament Kicks 3D Printed Optical Illusions Up a Notch

Posted on May 22, 2022 by Donald Papp

A new video from [Make Anything] shows off a nice combo that has a real visual impact: ambiguous shapes that look different depending on what angle they are viewed at, …read more Continue reading Bi-Color Filament Kicks 3D Printed Optical Illusions Up a Notch→

Posted in 3d Printer hacks, ambiguous shapes, bicolor PLA, illusion

HP-200LX Runs Website Like it’s the 90s

Posted on May 21, 2022 by Donald Papp

The HP-200LX palmtop was a fascinating machine for its time, and [Terrence Vergauwen] proves that its time is not yet over, given that one is responsible for serving up the …read more Continue reading HP-200LX Runs Website Like it’s the 90s→

Posted in 1990s, 200LX, computer hacks, hp, hp200lx, palmtop, retrocomputing, vintage computing, web server

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