[Courcirc8] was a big fan of the ALP AD-80, with the travel guitar being a surprisingly competent instrument despite its folding form-factor. However, the onboard headphone amp left something to be desired, so it was time to get hacking.
To achieve better audio output, [courcirc8] decided to purchase an iRig HD 2 guitar interface, and installed it inside the body of the compact guitar. The original volume pot on the guitar was instead spliced into the iRig circuit, and a switch hooked up to allow the guitar to output clean tones to an amp or the digital audio output of the iRig instead. It’s a tight fit inside, but it all nestles in there rather neatly when finished.
The result is a compact guitar that has a capable digital FX platform built in to the body; all one has to do is hook up a smartphone to gain access to a broad selection of software effects. It makes the guitar much more of a Swiss Army knife when playing on the road.
We’ve seen others before installing guitar effects into the instrument itself; it remains perhaps one of the best ways a hacker can express themselves with a completely individual instrument!
A team at the Wireless Bioelectronics Lab at the National University of Singapore led by [Dr John Ho] announced the results of their new Wireless Sensing (WiSe) smart sutures program last month. Their system consists of a specially prepared patch of polymer gel (the sensor) which is sewn into the wound using a silk suture coated with a conductive polymer. An external reader scans the sensor to monitor the status of the wound.
The concept is not unlike a NFC public transportation card, although with simplified electronics. There is no microcontroller or digital data being transferred. Rather, the sensor behaves like a tuned tank. The gel on the sensor was designed to degrade if the wound becomes infected, changing capacitance of the sensor structure and thus shifting its resonant frequency.
If you’ve ever had the misfortune to experience surgery, no doubt the surgeon and nurses drove home the importance of diligent monitoring of the wound for early signs of infection. These smart sutures allow detection of wound infection even before symptoms can seen or felt. They can be used on internal stitches up to 50 mm inside the body. More details can be read in this paper, and we covered another type of smart sensor back in 2016.
It isn’t often we get a project that has an eighteen-year-long timeline, as staying focused on one project for that long is a significant investment of someone’s lifetime. But when you’re making your own carbon copy Mclaren, you need to be prepared for it to take a while. Unfortunately, there are only 6 of them in the world so for most people if you want one, you need to make your own.
Granted, in those eighteen years, [Brough Built] freely admits there were some gaps. He scrapped most of the earlier work, and today’s current iteration took about three years. This car is made of steel, aluminum, foam, carbon fiber, and sweat. It is a close copy of the F1, and it has all the features you would expect to see on the real thing, like the centered driver’s seat and the gold cladding in the engine bay.
A BMW V12 engine mated to an Audi six-speed gearbox provides the power inside the car. A custom clutch assembly was machined to make it all work. Overall, this is an incredible build with time, and precision just poured into it. Folding and cutting all that metal alone, not to mention all the meticulous welds on everything from the gas tank to the door panels.
Making your own car is a complex and long journey that can be incredibly rewarding. Perhaps not a copy of an existing vehicle but something new; check out this soap shaped hand-made electric car.
When Star Trek: Voyager was in the development phase, concept art was created for a new style of tricorder to be used by the crew of the titular starship. But as it often the case with a younger sibling, the show ended up having to largely make do with the hand-me-down props from Star Trek: The Next Generation, which had recently finished its TV run.
Trek aficionado [Mangy_Dog] completed a jaw-dropping recreation of this unused tricorder design back in 2019, but unable to leave well enough alone, he’s recently completed a second version that truly raises the bar for fan replicas. It’s not hyperbole to say that the prop he’s created is of a far higher quality and fidelity than anything they would have had during the actual filming of the show.
Now you might be thinking that building the second version of the tricorder was easier than the first, and indeed, [Mangy_Dog] learned some important lessons from the earlier build. But that’s not to say that construction of this new replica, which was actually done on commission, went off without a hitch. In fact, he almost immediately ran into a serious problem. When he attempted to order a new display from Nextion, he found the quality had dropped significantly from the ones he’d used previously. The viewing angles and color reproduction were abysmal, so he was forced to go back to the drawing board and not only find a new display, but a completely new graphics chip to talk to it. Continue reading “Improving An Already Phenomenal Star Trek Prop”
[Handy Geng] lives in Baoding, China, where average winter temperatures can get as low as −7.7 °C (18.1 °F). Rather than simply freezing in the cold when using the bathroom, he decided he could do better. Thus came about his rather unique toilet paper heating system.
The build uses a gas burner heating up a wok. Toilet paper is fed into the wok body via motorized rollers salvaged from what appears to be an old counterfeit money detector. The wok is then shaken by a second motor in order to more evenly heat the toilet paper within. The burner can then be turned off, and the lid of the wok opened in order to gain access to the toasty toilet paper.
The system heats the toilet paper to a scorching 75 °C (167 °F); a little too warm to comfortably touch, but thankfully toilet paper doesn’t have a lot of thermal mass so cools off relatively quickly. It’s also thankfully well below the auto-ignition temperature of paper of 451 °F.
It’s a noisy, clanging machine that nonetheless provides the same warmth and comfort that you’re probably more familiar with from the office photocopier. It’s not [Handy Geng]’s first bathroom hack, either. Video after the break.
Continue reading “Toilet Paper Warmer Is A Unique Chinese Luxury”
Last time we talked about how Marlin has several bed leveling mechanisms including unified bed leveling or UBL. UBL tries to be all things to all people and has provisions to create dense meshes that model your bed and provides ways for you to adjust and edit those meshes.
We talked about how to get your printer ready for UBL last time, but not how to use it while printing. For that, you’ll need to create at least one mesh and activate it in your startup code. You will also want to correctly set your Z height to make everything work well. Continue reading “3D Printering: Getting Started With Universal Bed Leveling”
Hackaday Editor-in-Chief Elliot Williams and Managing Editor Tom Nardi are back again to talk about all the weird and wonderful stories from our corner of the tech world. Canon had to temporarily give up on chipping their ink cartridges due to part shortages, and that’s just too perfect to ignore. There’s also some good news for the International Space Station as the White House signals they’re ready to support the orbiting outpost until 2030.
We’ll also look at an extremely promising project to deliver haptic feedback for VR, programming bare-metal x86 with the Arduino IDE, and the incredible reverse engineering involved in adding a DIY autonomous driving system to a 2010 Volkswagen Golf. Finally we’ll find out why most of the human life on this planet depends on a process that many people have never heard of, and learn about the long history of making cars heavier than they need to be.
Take a look at the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!
Continue reading “Hackaday Podcast 151: The Hackiest VR Glove, Plotting Boba Fett With Shoelaces, ECU Hacking, And Where Does Ammonia Come From?”