A DIY E-Ink Tank Watch

January 26, 2024 by Dave Rowntree 9 Comments

[Augusto Marinucci] liked the classic Cartier Tank series of dress watches aesthetic, but wanted something a bit more techy, with a decent runtime on a single battery. E-Ink displays are often used in such applications, but finding one to fit a custom case design, is a tall order. When ordering one off the shelf is not easy, the solution is to make one from scratch.

Building a programming jig is a great idea for small-scale production

The article doesn’t have much information on the E-Ink side of things, which is a bit of a shame. But from what we can glean, the segment shapes — in this case, based on the famous Apollo DSKY — are formed in the top copper of a four-layer PCB, using filled and capped vias to connect invisibly from below.

A donor E-Ink display is cut to size with scissors (we don’t know much more than this!) and glued in place around the edge to make the common electrode connection. The display PCB attaches to the control PCB, at the rear using low-profile board-to-board connectors. This board hosts a PIC16 micro, as well as an RV-3028-C7 RTC which keeps time whilst consuming a paltry 45 nA.

Five volts are provided via a MAX1722 low-power boost converter which is fed power from the CR1616 cell via a couple of logic-controllable load switches. With a low-power design such as this, it’s critical to get this correct. Any mistakes here can easily result in a very low runtime. It is easy to over-stress small button cells and kill them prematurely.

The case looks like it’s printed in a translucent resin, with the PCB stack sealed inside with a UV-cured resin pour. It’s not immediately obvious if the rear panel can be removed to access the battery and programming port. There are what appear to be screw holes, so maybe that’s possible, or maybe they’re the rear side of the PCB mounting posts. Who can tell?

If DIY hardware is but too much effort for you, then there’s the option of hacking new firmware onto an existing watch, or perhaps meeting in the middle and making something out of all those junk E-ink tags you can get from time to time?

Thanks to [JohnU] for the tip!

Reverse-Engineering The Web-@nywhere Watch For 2001-Era Smartwatch Action

January 21, 2024 by Maya Posch 10 Comments

Although smartwatches seem to be just a recent fad, people have been strapping wristwatches to their wrists with all kinds of functionality. Whether a miniscule calculator, a remote control, an organizer or as in the case of the Web-@nywhere Watch a web browser. In the last case only sort of, naturally, as it was released in 2001 and this little early 2000s marvel cost only $85 (or $150 in 2024 USD), so what could it really be capable of? This is the million dollar question that [Cameron Kaiser] sought to find out as he found a new-in-box unit for sale.

The Web-@nywhere watch in action. (Credit: Cameron Kaiser)

Beforehand he knew already that the unit required interaction with a PC-based application to sync the 93 kB of on-watch data, with the required software and remote servers now being very much outdated and/or gone. This required some reverse-engineering to once more bring this watch widget back to life. Along the way it became also quite clear that this watch was designed as a cheap rip-off of the much better 1998 Seiko Ruputer – which later got sold also as the onHand PC – using the same joystick-driven interface.

After some poking around with the Windows-based software that came with the watch [Cameron] quickly realized that while it could establish a serial link with the watch in its cradle, it fully relied on a now defunct FTP server formerly run by the manufacturer, Kinger, along with any games and content on it. Since FTP servers were never archived like HTTP sites, this content is likely gone forever.

Fortunately, the protocol between the PC and the watch is a standard serial link (with parity), so [Cameron] was able to sniff the serial traffic and figure out the protocol, the results of which he has made available on GitHub in the form of a Perl script for transforming text and a C-based application to do the uploading. Now once again Web-@nywhere users can proudly roam the streets with 2024-era website content on their wrists.

‘Radar’ Glasses Grant Vision-free Distance Sensing

January 19, 2024 by Donald Papp 7 Comments

[tpsully]’s Radar Glasses are designed as a way of sensing the world without the benefits of normal vision. They consist of a distance sensor on the front and a vibration motor mounted to the bridge for haptic feedback. The little motor vibrates in proportion to the sensor’s readings, providing hands-free and intuitive feedback to the wearer. Inspired in part by his own experiences with temporary blindness, [tpsully] prototyped the glasses from an accessibility perspective.

The sensor is a VL53L1X time-of-flight sensor, a LiDAR sensor that measures distances with the help of pulsed laser light. The glasses do not actually use RADAR (which is radio-based), but the operation is in a sense quite similar.

The VL53L1X has a maximum range of up to 4 meters (roughly 13 feet) in a relatively narrow field of view. A user therefore scans their surroundings by sweeping their head across a desired area, feeling the vibration intensity change in response, and allowing them to build up a sort of mental depth map of the immediate area. This physical scanning resembles RADAR antenna sweeps, and serves essentially the same purpose.

There are some other projects with similar ideas, such as the wrist-mounted digital white cane and the hip-mounted Walk-Bot which integrates multiple angles of sensing, but something about the glasses form factor seems attractively intuitive.

Thanks to [Daniel] for the tip, and remember that if you have something you’d like to let us know about, the tips line is where you can do that.

37C3: The Tech Behind Life With Quadraplegia

January 9, 2024 by Elliot Williams 21 Comments

While out swimming in the ocean on vacation, a big wave caught [QuadWorker], pushed him head first into the sand, and left him paralyzed from the neck down. This talk isn’t about injury or recovery, though. It’s about the day-to-day tech that makes him able to continue living, working, and travelling, although in new ways. And it’s a fantastic first-hand insight into how assistive technology works for him.

If you can only move your head, how do you control a computer? Surprisingly well! A white dot on [QuadWorker]’s forehead is tracked by a commodity webcam and some software, while two button bumpers to the left and right of his head let him click with a second gesture. For cell phones, a time-dependent scanner app allows him to zero in successively on the X and Y coordinates of where he’d like to press. And naturally voice recognition software is a lifesaver. In the talk, he live-demos sending a coworker a text message, and it’s almost as fast as I could go. Shared whiteboards allow him to work from home most of the time, and a power wheelchair and adapted car let him get into the office as well.

The lack of day-to-day independence is the hardest for him, and he says that they things he misses most are being able to go to the bathroom, and also to scratch himself when he gets itchy – and these are yet unsolved problems. But other custom home hardware also plays an important part in [QuadWorker]’s setup. For instance, all manner of home automation allows him to control the lights, the heat, and the music in his home. Voice-activated light switches are fantastic when you can’t use your arms.

This is a must-watch talk if you’re interested in assistive tech, because it comes direct from the horse’s mouth – a person who has tried a lot, and knows not only what works and what doesn’t, but also what’s valuable. It’s no surprise that the people whose lives most benefit from assistive tech would also be most interested in it, and have their hacker spirit awakened. We’re reminded a bit of the Eyedrivomatic, which won the 2015 Hackaday Prize and was one of the most outstanding projects both from and for the quadriplegic community.

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Is This 3D Printed Third Arm Useful? Maybe?

December 25, 2023 by Lewin Day 11 Comments

Humans have two arms, and we do pretty good things with them. More is surely better, though, right? With that in mind, [Emily The Engineer] set out to make a third arm for popular YouTuber [This Old Tony], and our primary question is this: is it actually useful?

The basic design is based around a strapped-on arm brace, which mounts the additional appendage to the wearer’s forearm. It uses a motor-driven geared mechanism to open and close a gripper, but the first revision was incredibly slow to open and close, to the point of being almost useless. Changing out the threaded rod that drives the mechanism massively sped up the gripper, much to [Emily]’s satisfaction. Strength and mounting upgrades got it to the point where it could actually be used to lift objects like spray cans and bricks. Ultimately, though, the arm mount and controls do kind of prevent the user from using their left hand when they have the third hand fitted.

It’s a fun project, if not exactly a useful one, even if [Emily] does use it to carry extra grocery bags . It does have us wondering if some kind of shoulder or backpack-mounted arms could be useful, though. It’s certainly not up to the standards of modern prosthetic, but we do love the idea of human augmentation with additional robot limbs. Here’s hoping technology advances further to make builds like this more capable in future!

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DIY Cleats Give You Traction In Ice And Snow

December 24, 2023 by Lewin Day 16 Comments

It’s getting into the cold and snowy season for much of the world, and that means it can be slippy when you go walking outside. If you need more traction, but your shoes don’t have spikes, fear not. You can build yourself a set of these nifty strap-on cleats designed by [Zero To Infinity].

The cleats are a 3D printed design, which [Zero To Infinity] modeled in Fusion 360 to match their own shoes. Obviously, everybody’s shoes differ, so they’ve provided simple instructions on how to design your own similar cleats to suit your personal footwear. They’re then printed in a stiff TPU to give them the right amount of flex for bending to conform to the shoe. The cleats themselves are simply M4 bolts, nuts, and washers screwed through the cleats, pointy-side down. They can then be strapped to a shoe, and you’re done!

We’d love to see a set of snow shoes that are fully printed and ready to accept cleats. Indeed, we’ve seen some neat printed sneaker designs before. They haven’t really caught on yet, but there’s nothing to stop you printing the hottest kicks of 2024 right in your own home. When you do, don’t hesitate to hit up the tipsline!

Spice Up Your Earrings With Microelectronics

December 22, 2023 by Julian Scheffers 9 Comments

We’ve covered [mitxela] in the past and if you know him, you’ll likely know him for putting the micro in microelectronics. This year, he’s at it again with his LED Industrial Piercing.

A T-shaped flexible PCB that is smaller than an index finger — This tiny PCB is really pushing the limits of fabrication

Inspired by the absolutely tiny 0402 LEDs and industrial piercings, [mitxela] started thinking of a way to construct the 5cm long device. He found some normal LED earrings to steal the battery compartment from. Then, with a tick needle and some more steel, he created a new industrial earring with some holes.

Of course, no [mitxela] project is complete without comically tiny microsoldering and this project makes the VQFN ATTiny he used look large. He puts his PCB suppliers to the test with a merely 1mm wide flex PCB for the LEDs to be mounted on. Finally, he combines the flex PCB, the earring and some epoxy to create yet another piece of LED jewelry.

Video after the break.
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