Pulling Out Burger Flavor With A Magnet

If you’re vegetarian or don’t eat beef, you are probably already familiar with Impossible. Impossible meat tastes like beef and cooks like beef while being plant-based. They achieved this with significant R&D and a few special patents. But if you don’t want to pay Impossible prices, [Sauce Stash] has been trying to recreate some of the tricks that Impossible uses. (Video, embedded below.)

[Sauce Stash] starts with the ingredients list and tries to reason what would be suitable substitutes. However, even following the ingredients list, adding iron is one crucial trick that takes your vegetarian beef much closer to tasting like proper beef. Impossible has a special patent process for creating leghemoglobin (or heme), the iron molecule we associate with red meat’s taste. It makes the meat seem to bleed as it cooks and dramatically changes the flavor. Impossible genetically engineered yeast to produce the compound to get heme on an industrial scale. But they state on their website that the molecule can be found in many plants, including soy. With a magnet and soy in hand, he tried to pull the iron out overnight but didn’t get anything substantial. Unfortunately, the heme is in the root of the soy plant, not in the milk, so it was back to the drawing board.

There are a few other sources: breakfast cereals, black olives (often treated with iron gluconate), and the roots of other legumes. However, [Sauce Stash] took a more leisurely route and crushed a soy-based iron tablet. However, being a supplement, there were other ingredients that he didn’t want in his burger. So he used the magnet to extract the iron to include. After that, it was easy sailing, and he was very proud of the vegan burger he had created.

Creating something that tastes and feels like something else is a complex and tricky endeavor, and hacks like these are always interesting to think about. We’d take texture pea protein over an insect burger, but perhaps that is just something we need to get over. Video after the break.

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Food Irradiation Detector Doesn’t Use Banana For Scale

How do the potatoes in that sack keep from sprouting on their long trip from the field to the produce section? Why don’t the apples spoil? To an extent, the answer lies in varying amounts of irradiation. Though it sounds awful, irradiation reduces microbial contamination, which improves shelf life. Most people can choose to take it or leave it, but in some countries, they aren’t overly concerned about the irradiation dosages found in, say, animal feed. So where does that leave non-vegetarians?

If that line of thinking makes you want to Hulk out, you’re not alone. [kutluhan_aktar] decided to build an IoT food irradiation detector in an effort to help small businesses make educated choices about the feed they give to their animals. The device predicts irradiation dosage level using a combination of the food’s weight, color, and emitted ionizing radiation after being exposed to sunlight for an appreciable amount of time. Using this information, [kutluhan_aktar] trained a neural network running on a Beetle ESP32-C3 to detect the dosage and display relevant info on a transparent OLED screen. Primarily, the device predicts whether the dosage falls into the Regulated, Unsafe, or just plain Hazardous category.

[kutluhan_aktar] lets this baby loose on some uncooked pasta in the short demo video after the break. The macaroni is spread across a load cell to detect the weight, while [kutluhan_aktar] uses a handheld sensor to determine the color.

This isn’t the first time we’ve seen AI on the Hackaday menu. Remember when we tried those AI-created recipes?

An Impressively Functional Tacobot

We’re big fans of useless machines here at Hackaday, there’s something undeniably entertaining about watching a gadget flail about dramatically without actually making any progress towards a defined goal. But what happens when one of these meme machines ends up working too well? We think that’s just what we might be witnessing here with the Tacobot from [Vije Miller].

On the surface, building an elaborate robotic contraption to (slowly) produce tacos is patently ridiculous. Doubly so when you tack on the need to give it voice commands like it’s some kind of one-dish version of the Star Trek food replicator. The whole thing sounds like the setup for a joke, an assumption that’s only reinforced after watching the dramatized video at the break. But in the end, we still can’t get over how well the thing appears to work.

After [Vije] gives it a list of ingredients to dispense, a robotic arm drops a tortilla on a fantastically articulated rotating platform that can not only spin and move in two dimensions, but can form the soft shell into the appropriate taco configuration. The empty shell is then brought under a rotating dispenser that doles out (or at least attempts to) the requested ingredients such as beef, onions, cheese, and lettuce. With a final flourish, it squirts out a few pumps of the selected sauce, and then presents the completed taco to the user.

The only failing appears to be the machine’s ability to dispense some of the ingredients. The ground beef seems to drop into place without issue, but it visibly struggles with the wetter foodstuffs such as the tomatoes and onions. All we know is that if a robot handed us a taco with that little lettuce on it, we’d have a problem. On the project page [Vije] acknowledges the issue, and says that a redesigned dispenser could help alleviate some of the problem.

The issue immediately brought to mind the fascinating series of posts dedicated to handling bulk material penned by our very own [Anne Ogborn]. While the application here might be a bit tongue-in-cheek, it’s still a perfect example of the interesting phenomena that you run into when trying to meter out different types of materials.

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Induction Heater Uses New Coil

Induction cook tops are among the most efficient ways of cooking in the home that are commercially available to the average person. Since the cook surface uses magnetic fields to generate heat in the cookware itself, there is essentially no heat wasted. There are some other perks too, such as faster cooking times and more fine control, not to mention that it’s possible to build your own induction stove. All you need is some iron, wire, and a power source, and you can have something like this homemade induction cooker.

This induction heater has a trick up its sleeve, too. Instead of using an air coil to generate heat in the cookware, this one uses an iron core instead. The project’s creator [mircemk] built an air core induction stove in the past, and this new one is nearly identical with the exception of the addition of the iron core. This allows for the use of less wire, and uses a driver circuit called a Mazzilli ZVS driver running through some power MOSFETs to power the device. A couple inductors limit the current to 20A, but it appears to work just as well as the previous stove.

This build puts a homemade induction stove well within reach of anyone with an appropriate power supply and enough wire and inductors to build the coils. [mircemk] has made somewhat of a name for himself involving project that use various coils of wire, too, like this project we featured recently which uses two overlapping air-core coils to build an effective metal detector.

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Who Needs Yeast When You Have Lab Equipment?

This particular story on researchers successfully making yeast-free pizza dough has been making the rounds. As usual with stories written from a scientific angle, it’s worth digging into the details for some interesting bits. We took a look at the actual research paper and there are a few curious details worth sharing. Turns out that this isn’t the first method for yeast-free baking that has been developed, but it is the first method to combine leavening and baking together for a result on par with traditional bread-making processes.

Some different results from varying the amount of pressure released during the baking process.

Basically, a dough consisting of water, flour, and salt go into a hot autoclave (the header image shows a piece of dough as seen through the viewing window.) The autoclave pressurizes, forcing gasses into the dough in a process similar to carbonating beverages. Pressure is then released in a controlled fashion while the dough bakes and solidifies, and careful tuning of this process is what controls how the bread turns out.

With the right heat and pressure curve, researchers created a pizza whose crust was not only pleasing and tasty, but with a quality comparable to traditional methods.

How this idea came about is interesting in itself. One of the researchers developed a new method for thermosetting polyurethane, and realized that bread and polyurethane have something in common: they both require a foaming (proofing in the case of bread) and curing (baking in the case of bread) process. Performing the two processes concurrently with the correct balance yields the best product: optimized thermal insulation in the case of polyurethane, and a tasty and texturally-pleasing result in the case of pizza dough. After that, it was just a matter of experimentation to find the right balance.

The pressures (up to 6 bar) and temperatures (145° Celsius) involved are even pretty mild, relatively speaking, which could bode well for home-based pizza experimenters.

Extreme Espresso, Part 2: An Inductive Water Level Sensor

[Mark Smith] must really, really like his coffee, at least judging by how much effort he’s put into tricking out his espresso machine.

This inductive water tank sensor is part of a series of innovations [Mark] has added to his high-end Rancilio Silvia machine — we assume there are those that would quibble with that characterization, but 800 bucks is a lot to spend for a coffee maker in our books. We recently featured a host of mods he made to the machine as part of the “Espresso Connect” project, which includes a cool Nixie tube bar graph to indicate the water level in the machine. That display is driven by this sensor, the details of which [Mark] has now shared. The sensor straddles the wall of the 1.7-liter water tank, so no penetrations are needed. Inside the tanks is a track that guides a copper and PETG float that’s sealed with food-safe epoxy resin.

Directly adjacent to the float track on the outside of the tank is a long PCB with a couple of long, sinuous traces. These connect to an LX3302A inductive sensor IC, which reads the position of the copper slug inside the float. That simplifies the process greatly; [Mark] goes into great detail about the design and calibration of the sensor board, as well as hooking it into the Raspberry Pi Zero that lies at the heart of “Espresso Connect’. Altogether, the mods make for a precisely measured dose of espresso, as seen in the video below.

We’d say this was maybe a bit far to go for the perfect cup of coffee, but we sure respect the effort. And we think this inductive sensor method has a lot of non-caffeinated applications that probably bear exploration.

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Hack Your Recipes

If there is one thing Hackaday readers have in common, they like to make things. Of course, we don’t all make the same things and that’s great. But, unsurprisingly, a lot of people who like to create things include the kitchen as their workspaces. Why not? We all have to eat and there’s something very nice about cooking a meal for your loved ones or even just yourself. Cooklang is a markdown-style language from [Brian Sunte] specifically for capturing recipes. It not only formats the recipe, but it provides an easy way for software to parse the key elements while still being human-readable. This allows you to manipulate recipes just like software, including using Git for version control, for example.

There was a time that cooking meant having big cookbooks, but now you are more likely to search the Internet. There’s only one problem. For some reason, nearly every recipe site follows the same format. Thousands of words about how much the cook’s family loves the dish, how they pick out only the most succulent tomatoes to ensure the dish will have a vibrant scarlet hue, and how much their poor granny would have loved the dish, if only she had survived the 1928 flood which is described in great detail. After 20 minutes you find out that you put the tomatoes in the blender, add a cup of water, and that’s it. Cooklang is a sort of antidote for that. You can easily write something that parses the recipe and generates, say, a shopping list or compares it to your household inventory and places an order for the remaining things from the local grocery delivery.

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