Category Archives: hardware

Chaotic Oscillator From Antique Logic

While working on recreating an “ancient” (read: 60-year-old) logic circuit type known as resistor-transistor logic, [Tim] stumbled across a circuit with an unexpected oscillation. The oscillation appeared to be random and had a wide range of frequency values. Not one to miss out on a serendipitous moment, he realized that …read more

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Posted in chaotic, circuit, hardware, led, logic, oscillator, random, resistor-transistor, RTL, transistor | Leave a comment

DMCA Takedown Issued Over Casio Code That Wasn’t

Earlier this month, we posted coverage of an ingenious calculator hack that took a Casio calculator and put an ESP8266 module and an OLED display in the space occupied by its solar cell. Controlled by a pair of unobtrusive Hall effect devices, the calculator could have been used as an …read more

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Posted in casio, dmca, hardware, news, streisand effect | Leave a comment

Peek at the Off-Ear Speaker Prototypes for Valve’s VR

The Valve Index VR headset incorporates a number of innovations, one of which is the distinctive off-ear speakers instead of headphones or earbuds. [Emily Ridgway] of Valve shared the design and evolution of this unusual system in a deep dive into the elements of the Index headset. [Emily] explains exactly …read more

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Posted in audio, BMR, deep dive, design, Engineering, hardware, home entertainment hacks, off-ear, prototyping, sound design, speakers, valve, Virtual Reality, vr | Leave a comment

Classic 8-Bit Computing the Atari Way

In the classic gaming world, even before the NES arrived on the scene, there was no name more ubiquitous than Atari. Their famous 2600 console sold almost as many units as the Nintendo 64, but was released nearly 20 years prior. In many ways, despite making mistakes that led to …read more

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Posted in 2600, assembly, atari, basic, coding, Games, hardware, modifications, software, video game | Leave a comment

Modular Mouse Packs Features

Not only do console gamers complain about the use of a mouse, but PC users themselves often don’t have kind words to say even about some of the higher-end options. Granted, their gripes aren’t about game experience or balance, they’re usually about comfort, features, or longevity of the mice themselves. …read more

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Posted in 3d print, custom, hardware, modular, mouse, open source, software | Leave a comment

Altium has its 2kicad Moment

Around these parts we tend to be exponents of the KiCad lifestyle; what better way to design a PCBA than with free and open source tools that run anywhere? But there are still capabilities in commercial EDA packages that haven’t found their way into KiCad yet, so it may not …read more

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Posted in altium, altium designer, altium importer, hardware, importer, KiCAD, open hardware | Leave a comment

Three years of HardwareX: Where are they now?

After three years of online publications, HardwareX may have solidified itself as an academic journal for open-source hardware. We originally wrote about HardwareX back in 2016. At the time, HardwareX hadn’t even published its first issue and only begun soliciting manuscripts. Now after three years of publishing, six issues as …read more

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Posted in academia, Elsevier, hardware, HardwareX, oshw, science | Leave a comment

A Hacker’s Guide to JTAG

If you’re reading Hackaday, you’ve almost certainly heard of JTAG. There’s an excellent chance you’ve even used it once or twice to reflash an unruly piece of hardware. But how well do you actually know JTAG? More specifically, do you know how useful it can be when reverse engineering hardware? …read more

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Posted in debugging, firmware, hardware, jtag, openocd, reverse engineering | Leave a comment

Magnets Turn Flexible PCB Into Electric Grasshopper

Just because something doesn’t seem to have an apparent purpose, that doesn’t mean we shouldn’t try making it anyway. As flexible PCBs become cheaper and easier to order from low-scale fab houses, we’re seeing hobbyists experiment with new uses for them such as [Carl Bugeja]’s jumping circuit.

The circuit is …read more

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Posted in electromagnet, flexible circuit board, flexible PCB, flexible robotics, hardware, magnets | Leave a comment

Dissecting China-Sourced Vintage HP 1970s ICs: Genuine Or Not?

While repairing a real-time clock module for a 1970s HP computer that had been damaged by its leaky internal battery, [CuriousMarc] began to suspect that maybe the replacement clock chips which he had sourced from a seller in China were the reason why the module still wasn’t working after the …read more

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Posted in AC5948N, hardware, HP, repair hacks, retrocomputing, texas instruments | Leave a comment