A white, house-shaped clock with the words "TEMPUS NECTIT" written in faux Roman script in black on a strip of silver at the base of the "roof." a white power cord extends from the left of the enclosure, and the center of the clock is a 22 pin knitting machine wheel with one pin covered in silver metalic. A white plastic peg extends from the bottom right of the enclosure to hold the feedstock yarn.

Tempus Nectit, A DIY Knitting Clock With Instructions

April 5, 2023 by Navarre Bartz 1 Comment

We’re no strangers to unusual clocks here at Hackaday, and some of our favorites make time a little more tangible like [Kyle Rankin]’s knitting clock.

Inspired by our coverage of [Siren Elise Wilhelmsen]’s knitting clock, [Rankin] decided to build one of his own. Since details on the build from the original artist were sparse, he had to reverse engineer how the device worked. He identified that a knitting clock is essentially a knitting machine with a stepper motor replacing the hand crank.

Using a Raspberry Pi with an Adafruit motor hat connected to a stepper motor and a 3D printed motor adapter, [Rankin] was able to drive the knitting machine to do a complete round of knitting every twelve hours. By marking one of the knitting pegs as an hour hand, the clock works as a traditional clock in addition to its year-long knitting task. [Rankin] says he still has some fine tuning to work on, but that he’s happy to have had the chance to combine so many of his interests into a single project.

If you’re looking for more knitting hacks, check out this knitted keyboard instrument or a knitted circuit board.

Continue reading “Tempus Nectit, A DIY Knitting Clock With Instructions” →

A clear flexible PCB with a number of gold electrodes on one end. It is wrapped over a black cable to demonstrate its flexibility. A set of dashed white lines goes from one end to a zoomed in image of the circuit structure inset in the top right of the image.

Biohybrid Implant Patches Broken Nerves With Stem Cells

March 29, 2023 by Navarre Bartz 17 Comments

Neural interfaces have made great strides in recent years, but still suffer from poor longevity and resolution. Researchers at the University of Cambridge have developed a biohybrid implant to improve the situation.

As we’ve seen before, interfacing electronics and biological systems is no simple feat. Bodies tend to reject foreign objects, and transplanted nerves can have difficulty assuming new roles. By combining flexible electronics and induced pluripotent stem cells into a single device, the researchers were able to develop a high resolution neural interface that can selectively bind to different neuron types which may allow for better separation of sensation and motor signals in future prostheses.

As is typically the case with new research, the only patients to benefit so far are rats and only on the timescale of the study (28 days). That said, this is a promising step forward for regenerative neurology.

We’re no strangers to bioengineering here. Checkout how you can heal faster with electronic bandages or build a DIY vibrotactile stimulator for Coordinated Reset Stimulation (CRS).

(via Interesting Engineering)

A clear droplet sits on a blue PCB with gold traces. A syringe with a drop of clear liquid sits above the droplet.

Grow Your Own Brain Electrodes

March 23, 2023 by Navarre Bartz No comments

Bioelectronics has been making great strides in recent years, but interfacing rigid electrical components with biological systems that are anything but can prove tricky. Researchers at the Laboratory for Organic Electronics (LOE) have found a way to bridge the gap with conductive gels. (via Linköping University)

Outside the body, these gels are non-conductive, but when injected into a living animal, the combination of gel and the body’s metabolites creates a conductive electrode that can move with the tissue. This is accompanied by a nifty change in color which makes it easy for researchers to see if the electrode has formed properly.

Applications for the technology include better biological sensors and enhanced capabilities for future brain-controlled interfaces. The study was done on zebrafish and medicinal leeches, so it will be awhile before you can pick up a syringe of this stuff at your local computer store, but it still offers a tantalizing glimpse of the future.

We’ve covered a few different brain electrodes here before including MIT’s 3D printed version and stentrodes.

A green PCB with an ISA card slot and various connectors and components. The text "DISAPPOINTMENT LPC to ISA Adapter" is printed in the bottom left of the board.

ISA Over TPM To Your PC

March 23, 2023 by Navarre Bartz 27 Comments

Sometimes you really want to use your legacy SoundBlaster instead of emulating it for classic games. While modern PCs don’t have ISA slots, [TheRasteri] is fixing this shortcoming with his dISAppointment board. (via Adafruit)

ISA was the standard card bus for PCs during the golden age of DOS gaming, and many of these games will still run on modern x86 hardware. Unfortunately, they run into hiccups with regards to sound since they were designed to specifically support ISA-based sound cards. [TheRasteri] found he could access the ISA bus lurking in modern computers through the Low Pin Count (LPC) bus which is exposed on the TPM port in many modern motherboards.

Testing the card with DOOM, he gets music and sound effects with no emulation required. Open Source files and a more detailed video are on the way, so stay tuned if you’re hankering for more ISA goodness on your modern rigs.

We’re no strangers to ISA here. We’ve covered the basics of the ISA bus as well as plugging ISA cards into USB and how you can emulate vintage ISA cards with a Raspberry Pi and FPGA.

Continue reading “ISA Over TPM To Your PC” →

A metal watch is held in a man's fingers. The watchface has a laser etched chess board with miniature chess pieces made of brass enacting a match. The time is told on an etched chess clock to the right hand side of the timepiece and a small window on the rightmost "clock" shows the date.

A Little Chess With Your Timepiece

March 23, 2023 by Navarre Bartz 12 Comments

Some things remain classics, even after centuries, and chess and watches have certainly stood the test of time. [W&M Levsha] decided to combine them both in this “Chess Club” watch containing a miniature chess game frozen in time.

[W&M Levsha] used an off-the-shelf wristwatch for the mechanism and case, but rearranged the parts and built a custom watchface that’s much nicer than the original. The new watchface was cut and etched on a fiber laser after disassembly of the original watch.

The real magic happens when [W&M Levsha] turns those teeny little chess pieces on the lathe. The knight was a two piece affair with the horse head being laser cut out of brass sheet and then soldered onto a turned base. As you can see from the video embedded below, all of the chess pieces inside the watch could fit on the maker’s fingernail! It’s probably a good thing that this tiny set isn’t playable since trying to play on a board that size would be an exercise in patience.

We’ve seen machined chess sets here before at a larger scale, but if you’re more into 3D printing, how about teaching your printer to play?

Continue reading “A Little Chess With Your Timepiece” →

Sixteen wires of various colors are attached in pairs to record the electrical activity of split gill fungi (Schizophyllum commune) on a mossy, wooden stick. photo by Irina Petrova Adamatzky

Unconventional Computing Laboratory Grows Its Own Electronics

March 15, 2023 by Navarre Bartz 6 Comments

While some might say we’re living in a cyberpunk future already, one technology that’s conspicuously absent is wetware. The Unconventional Computing Laboratory is working to change that.

Previous work with slime molds has shown useful for spatial and network optimization, but mycelial networks add the feature of electrical spikes similar to those found in neurons, opening up the possibility of digital computing applications. While the work is still in its early stages, the researchers have already shown how to create logic gates with these fantastic fungi.

Long-term, lead researcher [Andrew Adamatzky] says, “We can say I’m planning to make a brain from mushrooms.” That goal is quite awhile away, but using wetware to build low power, self-repairing fungi devices of lower complexity seems like it might not be too far away. We think this might be applicable to environmental sensing applications since biological systems are likely to be sensitive to many of the same contaminants we humans care about.

We’ve seen a other efforts in myceliotronics, including biodegradable PCB substrates and attempts to send sensor signals through a mycelial network.

Via Tom’s Hardware.

A closeup of a ring and "flower" electrode attached to a translucent piece of material with fainter wires. The flower and ring electrodes are made of molybdenum that has a somewhat accordion fold back-and-forth cross-section.

Electronic Bandage Speeds Wound Healing

March 11, 2023 by Navarre Bartz 20 Comments

We’re a long way from the dermal regenerators in Star Trek, but researchers at Northwestern University have made a leap forward in the convenient use of electrotherapy for wound healing.

Using a ring and center “flower” electrode, this bioresorbable molybdenum device restores the natural bioelectric field across a wound to stimulate healing in diabetic ulcers. Only 30 minutes of electrical stimulation per day was able to show a 30% improvement in healing speed when used with diabetic mice. Power is delivered wirelessly and data is transmitted back via NFC, meaning the device can remain on a patient without leaving them tethered when not being treated.

Healing can be tracked by the change in electrical resistance across the wound since the wound will dry out as it heals. Over a period of six months, the central flower electrode will dissolve into the patient’s body and the rest of the device can be removed. Next steps include testing in a larger animal model and then clinical trials on human diabetic patients.

This isn’t the first time we’ve covered using electricity in medicine.

Continue reading “Electronic Bandage Speeds Wound Healing” →