A chicken's egg with many holes glows beneath a glass globe set atop an inverted wooden bowl.

Glowing Egg Is A One-Oeuf Solution For Tracking Cycles

September 7, 2024 by Kristina Panos 28 Comments

Look, if something happened to you every three weeks or so to basically turn you into a different person and factored heavily into whether any new humans were created, you’d probably want to keep abreast of the schedule, yeah? Yeah. So, while there are, of course, a ton of ways to do this with your phone, most of those apps do gross things with your data. Are you angry yet?

[Jakoba the Online Witch] certainly was, or if not angry, at least annoyed. So she built a glowing egg timer, which shines a different color based on current point in her cycle, to let her know when she is fertile and expecting Aunt Flo.

The coolest part is that this is an actual egg from one of [Jakoba]’s backyard chickens. No. The coolest part is how she was able to make so many holes without breaking it. (It took four tries.)

After bleaching the insides, the egg was ready to glow. As [Jakoba] says, the guts are simple — just a Wemos D1 Mini ESP8266, a WS2812 LED, and a heatsink. The enclosure consists of an inverted peanut bowl with a glass ornament hot-glued in place.

Once it was put together, all she had to do was add it in Home Assistant and use the current calendar state to trigger services from the YAML configuration.

Would you prefer an on-body solution? Here’s an earring that tracks temperature.

A client uses an Augmented Alternative Communication board that speaks.

Tactile Communication Board Speaks The Truth

September 5, 2024 by Kristina Panos 18 Comments

Sometimes, simple things can make a world of difference. Take for example a non-verbal person who can’t necessarily control a touch screen in order to tell someone else what they need or want or think.

This is where Augmentative and Alternative Communication (AAC) devices come in. Recently tasked with building such a device, [Thornhill!] came up with a great design that houses 160 different phrases in a fairly small package and runs on CircuitPython.

Basically, the client presses the appropriate snap-dome button button and the corresponding phrase is spoken through the speaker. The 10×16 grid of buttons is covered with a membrane that both feels nice and gives a bit of protection from spills.

The buttons can achieve high actuation forces and have a crisp tactile response, which means they’re probably gonna go a long way to keep the user from getting frustrated.

This handy AAC board is built on the Adafruit RP2040 Prop-Maker Feather and two keypad matrices. If this weren’t useful enough as it is, [Thornhill!] also built an even smaller version with 16 buttons for the client to wear around their neck.

Did you know? AAC boards aren’t just for humans.

A giemsa stained blood smear from a person with beta thalassemia (Credit: Dr Graham Beards, Wikimedia Commons)

Potential Cure For All Of England’s Beta Thalassemia Patients Within Reach

August 10, 2024 by Maya Posch 6 Comments

Beta thalassemia and sickle cell are two red blood cell disorders which both come with massive health implications and shortened lifespans, but at least for UK-based patients the former may soon be curable with a fairly new CRISPR-Cas9 gene therapy (Casgevy) via the UK’s National Health Service (NHS). Starting with the NHS in England, the therapy will be offered to the approximately 460 β thalassemia patients in that part of the UK at seven different NHS centers within the coming weeks.

We previously covered this therapy and the way that it might offer a one-time treatment to patients to definitely cure their blood disorder. In the case of β thalassemia this is done by turning off the defective adult hemoglobin (HbA) production and instead turning the fetal hemoglobin (HbF) production back on. After eradicating the bone marrow cells with the defective genes, the (externally CRISPR-Cas9 modified) stem cells are reintroduced as with a bone marrow transplant. Since this involves the patient’s own cells, no immune-system suppressing medication is necessary, and eventually the new cells should produce enough HbF to allow the patient to be considered cured.

So far in international trials over 90% of those treated in this manner were still symptom-free, raising the hope that this β thalassemia treatment is indeed a life-long cure.

Top image: A giemsa stained blood smear from a person with beta thalassemia. Note the lack of coloring. (Credit: Dr Graham Beards, Wikimedia Commons)

The BiVACOR Total Artificial Heart: A Maglev Bridge To Life

July 28, 2024 by Maya Posch 28 Comments

The BiVACOR THA hooked up with the CTO Dianiel Timms in the background. (Credit: BiVACOR)

Outside of the brain, the heart is probably the organ that you miss the most when it ceases to function correctly. Unfortunately, as we cannot grow custom replacement hearts yet, we have to keep heart patients alive long enough for them to receive a donor heart. Yet despite the heart being essentially a blood pump, engineering even a short-term artificial replacement has been a struggle for many decades. A new contender has now arrived in the BiVACOR TAH (total artificial heart), which just had the first prototype implanted in a human patient.

Unlike the typical membrane-based pumps, the BiVACOR TAH is a rotary pump that uses an impeller-based design with magnetic levitation replacing bearings and theoretically minimizing damage to the blood. This design should also mean a significant flowrate, enough even for an exercising adult. Naturally, this TAH is only being tested as a bridge-to-transplant solution, for patients with a failing heart who do not qualify for a ventricular assist device. This may give more heart patients a chance to that donor heart transplant, even if a TAH as a destination therapy could save so many more lives.

The harsh reality is that the number of donor hearts decreases each year while demand increases, leading to unconventional approaches like xenotransplantation using specially bred pigs as donor, as well as therapeutic cloning to grow a new heart from the patient’s own cells. Having a universal TAH that could be left in-place (destination therapy) for decades would offer a solid option next to the latter, but remains elusive. As shown by e.g. the lack of progress with a TAH like the ReinHeart despite a promising 2014 paper in a bovine model.

Hopefully before long we’ll figure out a reliable way to fix this ‘just a blood pump’ in our bodies, regardless of whether it’s a biological or mechanical solution.

Two of these boards next to each other, one showing the front, assembled, side with the MCU and supporting components soldered on, and the other showing the back, patch panel, side, with wires connecting the MCU pads to testpoints leading to the supporting components

Try Out MCUs With This Jumperable TSSOP20 Adapter

June 29, 2024 by Arya Voronova 7 Comments

There are so many new cool MCUs coming out, and you want to play with all of them, but, initially, they tend to be accessible as bare chips. Devboards might be hard to get, not expose everything, or carry a premium price. [Willmore] has faced this problem with an assortment of new WCH-made MCUs, and brings us all a solution – a universal board for TSSOP20-packaged MCUs, breadboard-friendly and adaptable to any pinout with only a few jumpers on the underside.

The board brings you everything you might want from a typical MCU breakout – an onboard 3.3V regulator, USB series resistors, a 1.5K pullup, decoupling capacitors, and a USB-C port. All GPIOs are broken out, and there’s a separate header you can wire up for all your SWD/UART/USB/whatever needs – just use the “patch panel” on the bottom of the board and pick the test points you want to join. [Willmore] has used these boards for the CH32Vxxx family, and they could, no doubt, be used for more – solder your MCU on, go through the pin table in the datasheet, do a little point-to-point wiring, and you get a pretty functional development board.

Continue reading “Try Out MCUs With This Jumperable TSSOP20 Adapter” →

A clipping of the "3D Printing & Modelling" skill tree. An arrow pointing up says "Advanced" and there are several hexagons for various skills on the page including blanks for writing in your own options and some of the more advanced skills like "Print in Nylon or ASA material"

Maker Skill Trees Help You Level Up Your Craft

June 11, 2024 by Navarre Bartz 12 Comments

Hacking and making are great fun due to their open ended nature, but being able to try anything can make the task of selecting your next project daunting. [Steph Piper] is here with her Maker Skill Trees to give you a map to leveling up your skills.

Featuring a grid of 73 hexagonal tiles per discipline, there’s plenty of inspiration for what to tackle next in your journey. The trees start with the basics at the bottom and progressively move up in difficulty as you move up the page. With over 50 trees to select from (so far), you can probably find something to help you become better at anything from 3D printing and modeling to entrepreneurship or woodworking.

Despite being spoiled for choice, if you’re disappointed there’s no tree for your particular interest (underwater basket weaving?), you can roll your own with the provided template and submit it for inclusion in the repository.

Want to get a jump on an AI Skill Tree? Try out these AI courses. Maybe you could use these to market yourself to potential employers or feel confident enough to strike out on your own?

[Thanks to Courtney for the tip!]

Continue reading “Maker Skill Trees Help You Level Up Your Craft” →

An example of the case generated for a simple PCB, being shown in the OpenSCAD viewer

Turbocase Generates A PCB Shell For You

June 3, 2024 by Arya Voronova 23 Comments

Our PCBs greatly benefit from cases – what’s with all the pins that can be accidentally shorted, connectors that stick out of the outline, and cables pulling the board into different directions. Designing a case for your PCB might feel like a fair bit of effort – but it likely isn’t, thanks to projects like turbocase from [Martijn Braam].

This script generates simple and elegant OpenSCAD cases for your KiCad PCBs – you only need to draw a few extra lines in the PCB Editor, that’s it. It makes connector openings, too – add a “Height” property to your connector footprints to have them be handled automatically. Oh, and there’s a few quality-of-life features – if your project has mounting holes, the script will add threaded-insert-friendly standoffs to the case; yet another argument for adding mounting holes to your boards, in case you needed more.

Installing the script is a single line, running it is merely another, and that will cover an overwhelming majority of boards out there; the code is all open too, of course. Want some more customization? Here’s some general project enclosure tutorials for OpenSCAD, and a KiCad-friendly StepUp tutorial. Oh, and of course, there’s many more ways to enclose PCBs – our own [Bob Baddeley] has written a guide to project enclosures that you are bound to learn new things from.

We thank [adistuder] for sharing this with us!