There Is No Spoon; Automatic Self Stirring Mug

Sometimes it’s helpful to realize the truth that there is no spoon. At least, not with [Ronaldo]’s automatic self-stirring mug. At first it was just a small propeller in the bottom of the mug that turned on by pushing a button in the handle, but this wasn’t as feature-rich as [Ronaldo] hoped it could be, so he decided to see just how deep the automatic beverage-mixing rabbit hole goes.

The first thing to do was to get a microcontroller installed to handle the operation of the motor. The ATtiny13a was perfect for the job since it’s only using one output pin to control the motor, and can be configured to only draw 0.5 microamps in power-saving mode. This ensures a long life for the two AAA batteries that power the microcontroller and the motor.

As far as operation goes, the motor operates in different modes depending on how many times the button in the handle is pushed. It can be on continuously or it can operate at pre-determined intervals for a certain amount of time, making sure to keep the beverage thoroughly mixed for as long as the power lasts. Be sure to check out the video below for a detailed explanation of all of the operating modes. We could certainly see some other possible uses for more interesting beverages as well.

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Edible art from a Robot Pancake Printer

In case you didn’t know it, pancake art is a thing. People are turning out incredible edible artwork using squeeze bottles and pancake batter. But even if you’re not terribly artistic, you can still amaze your breakfast buddies with this robotic pancake printer.

At its simplest – and in our opinion its most impressive – pancake art involves making patterns with thin batter on a hot griddle. The longer the batter is cooked, the darker it becomes, and art happens. To capitalize on this, [Trent], [Kevin], [Sunny] and [Isaac] built a 2-axis gantry with a working area the size of an electric griddle. A bottle is pressurized with a small air pump and controlled by a solenoid valve to serve as a batter extruder, and an Arduino controls everything. Custom pancake design software lets you plan your next masterpiece before committing it to batter.

Sadly, the video below shows us that the team didn’t include an automatic flipper for the pancake, but no matter – that’ll make a great feature for the next version. Maybe something like this?

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Is Robot Butter Better Butter?

Humans have been making butter for thousands of years. If you have a cooperative cow or sheep and a means to agitate her milk, butter is not far behind. So why would you employ a $15,000 industrial robot to make butter? Because – robot butter!

Actually, Robutter is a design experiment by [Stephan], [Philipp], and [Jonas] to explore where craft ends and industrial processes begin, and to see how automation adds or removes values from traditional products. It’s a fair question, given that butter can be churned with everything from animal skins to massive continuous churns. So the team programmed [DIRK], a Fanuc LR Mate 200ic which is normally more at home on an assembly line, to carefully agitate a container of cream. After a bit of fiddling they found the optimal position and movements to produce a delicate butter that looks pretty tasty. The video after the break shows the process and the results, but sadly there’s no taste test of the Robutter against grocery store butter.

It may come as a surprise that Hackaday appears never to have featured a butter making project before. Sure, we’ve got a lot of food hacks, most of which seem to involve beer or coffee. But we did run across a recent article on a buttermilk pancake-making robot that you might like to check out.

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Smart Coaster Informs You When Your Drink Is Ready

How many times have you made a cup of coffee or tea and it’s been too hot to drink, and then by the time you get to it, it’s become too cold? While very much a #firstworldproblem, [ToniTheAxe] decided to fix it — and enter a contest at the same time. He calls it the µCoaster, and essentially, it is a temperature sensing alarm clock.

The coaster uses a TMP006 infrared temperature sensor which measures the temperature of whatever you place on the coaster indirectly. It also doesn’t use much power. He designed the PCBs around this and created a very nice looking coaster that’s powered off of a button cell battery — he thinks it’ll last for around 6 months with daily usage — though that depends on how bad your caffeine addiction is.

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Hack a Cake

What’s a hacker going to do with an oven? Reflow solder? Dry out 3D printing filament? If you are [Alicia Gibb] you’d be baking a cake. While complaining that projects aren’t a hack seems to be a favorite past time for Hackaday commentators, we think [Alicia] will be in the clear. Why? Because these cakes have Arduinos, LEDs, and motorized candles among other gizmos.

The Game Boy cake is undeniably cool, although we have to admit the cake that screams when cut got our attention (see video below), even if it would unnerve guests.

As you might expect, you can’t bake the electronics directly into the cake. [Alicia] uses Tupperware or parchment paper to create cavities for the electronics. Connections and other solder joints get professional grade Saran wrap to keep the lead and other awful chemicals out of the cake.

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Coffee Straight From The Tap

Do you love coffee? Of course you do. Do you sometimes wish you could drink coffee instead of water? Do you want to void the warranty on your hot water heater? Yes? Well, then we have the hack for you!

A Norweigan science show called Ikke gjør dette hjemme (Do Not Try This at Home) decided it would be fun to see what would happen if you turned your hot water heater into a giant coffee machine. They didn’t put much effort into the conversion, in fact, they just opened up the tank and poured copious amounts of instant coffee into the tank. But they did it, and that saves us from wondering if it’s possible. Spoiler: It is.

Stick around after the break to see the water run brown — in a good way.

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Your Steaks Sleep with the Fishes in this Giant Sous Vide Aquarium

A small engineering company in Germany called [Nerdindustries] decided to throw a party, and in doing so, wanted to squash some rumors that nerds only eat pizza and take out. We’d say they successfully one-uped their friends while proving they too can make gourmet food. The gathering included a massive sous vide cooker out of an old 240L aquarium. Be warned, their website presentation is rather annoying but worth it.

sousvide aquarium thumbnailThey got the aquarium off eBay for $40, and started the project by resealing the aquarium with some silicone. Water adding some aluminium extrusion they mounted six immersion heaters. Three to heat it to temperature, and another three running off a PID control loop with waterproof temperature sensors to maintain it within a degree or so. Of course that wouldn’t get you very far unless you completed the build by filling the aquarium with water.
To make it a bit fancier for the party, they also threw a projector above it to display some simple visuals in the water. For their big night, they cooked steaks at 60C for about an hour and a half, and then finished in a pan to sear before serving — they were a hit. There’s a video on the site, but we can’t embed it here, so you’ll have to go check it out!

Is Sous Vide still a hot topic with hackers? There was a flurry of activity a few years back (Sous Vadar obviously one of our favorites) but we haven’t seen nearly as many projects lately. Actually we recently saw a Sous Vide repurposed for brewing instead of cooking.