Wake Up To Fresh Coffee!

Be careful what you say when you are shown a commercial product that you think you could make yourself, you might find yourself having to make good on your promise.

When he was shown a crowdfunded alarm clock coffee maker, [Fabien-Chouteau] said “just give me an espresso machine and I can do the same”. A Nespresso capsule coffee machine duly appeared on his bench, so it was time to make good on the promise.

The operation of a Nespresso machine is simple enough, there is a big lever on the front that opens the capsule slot and allows a spent capsule to drop into a hopper. Drop in a new capsule, pull the lever down to load it into the mechanism, then press one of the buttons to tell it to prime itself. After a minute you can them press either of the large cup or the small cup buttons, and your coffee will be delivered.

To automate this with an alarm clock there is no necessity to operate the lever, it’s safe to leave loading a capsule to the user. Therefore all the clock has to do is trigger the process by operating the buttons. A quick investigation with a multimeter on the button PCB found that the voltage present was 15 V, well above the logic level of the STM32F469 board slated for the clock. Thus a simple circuit was devised using a MOSFET to  do the switching.

Finally, the clock software was created for the STM32F469. The chip’s 2D graphics acceleration hardware and the development board’s high quality display make for a very slick interface indeed.

You can see the resulting clock in the video below the break. It’s an alarm clock coffeemaker we’d be proud to have beside our beds, but there’s one slight worry. On a mains-powered device like the Nespresso the low voltage rails are not always mains-isolated, and it’s not clear whether or not this is the case. Maybe we’d have incorporated an opto-isolator, just in case.

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Alexa Robot Coffee Maker Brews Coffee, Speaks For Itself

To keep hackers fueled and hacking, why not hack a coffee maker into a coffee brewing robot? [Carter Hurd] and [David Frank] did just that at The Ohio State’s Hack OHI/O 24 hour Hackathon. They even won the “Best Hardware Hack”. The video below shows it in action but the guys sent us some extra details on how it’s made.

To give it a voice they put Alexa on a Raspberry Pi. Using an audio splitter they have the voice go both to a speaker and to an Arduino. The Arduino then uses the amplitude of the audio signal’s positive values to determine how much to open the “mouth”, the coffee maker’s hinged cover. As is usually the case, there’s some lag, but the result is still quite good.

The brewing is also controlled by the Arduino. They plan to add voice control so that they can simply ask, “Alexa, make me coffee”, but for now they added a switch on the side to start the brewing. That switch tells the Arduino to work one servo to open the cover, another to insert a coffee filter, and two more to scoop up some coffee from a container and dump it into the filter.

They replaced the coffee maker’s on/off switch with a relay so that after the Arduino closes the cover again, it uses the relay to start the brewing. The result is surprisingly human-like. We especially like the graceful movement achieved by the two servos for scooping up and dumping the coffee. Full disclosure: they did admit that it would often either not scoop enough coffee or scoop enough but spill a bunch on the group.

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Brew a Cup of Coffee Without Electricity!

So, wether you’ve blown your house’s breakers while cranking up the power on your latest project or a storm has brought low the local power grid, what do you do if you desperately need coffee with no electricity to power your coffee maker? Make like [austiwawa]: crack it open and bust out the tea lights.

Removing the bottom of the coffee maker is simply done, exposing the resistance heating element. Improvising a jig to hold the coffee maker over an arrangement of five tea lights, the candle flames slowly do the work of heating the element to set the maker in motion.

It’s a solution for after the apocalypse… as long as you can find tea lights, coffee plus a grinder, and for some reason don’t want to use the quick and efficient method of brewing over an actual fire (though kitchen hearths are a rarity these days). Now we kind of want to see this adapted for all kinds of other heat sources. Reflected sunlight anyone?

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Reverse Engineering The Internet Of Coffee

The public promise of the Internet Of Things from years ago when the first journalists discovered the idea and strove to make it comprehensible to the masses was that your kitchen appliances would be internet-connected and somehow this would make our lives better. Fridges would have screens, we were told, and would magically order more bacon when supplies ran low.

A decade or so later some fridges have screens, but the real boom in IoT applications has not been in such consumer-visible applications. Most of your appliances are still just as unencumbered by connectivity as they were twenty years ago, and that Red Dwarf talking toaster that Lives Only To Toast is still fortunately in the realm of fiction.

The market hasn’t been devoid of IoT kitchen appliances though. One is the Smarter Coffee coffee machine, a network-connected coffeemaker that is controlled from an app. [Simone Margaritelli] bought one, though while he loved the coffee he really wasn’t keen on its not having a console application. He thus set about creating one, starting with reverse engineering its protocol by disassembling the Android version of its app.

What he found was sadly not an implementation of RFC 2324, instead it uses a very simple byte string to issue commands with parameters such as coffee strength. There is no security, and he could even trigger a firmware upgrade. The app requires a registration and login, though this appears to only be used for gathering statistics. His coffee application can thus command all the machine’s capabilities from his terminal, and he can enjoy a drink without reaching for an app.

On the face of it you might think that the machine’s lack of security might not matter as it is on a private network behind a firewall. But it represents yet another example of a worrying trend in IoT devices for completely ignoring security. If someone can reach it, the machine is an open book and the possibility for mischief far exceeds merely pranking its owner with a hundred doppio espressos. We have recently seen the first widely publicised DDoS attack using IoT devices, it’s time manufacturers started taking this threat seriously.

If the prospect of coffee hacks interests you, take a look at our previous coverage.

[via /r/homeautomation]

Hackaday Prize Entry: Coffee Machine Grows In Complexity With No Sign Of Stopping

In Star Trek, there is a race of cyborgs with a drive to slowly assimilate all sentient life. Their aesthetic is not far off from the one [Ronald]’s ever expanding coffee machine is taking on. One has to wonder, what dark purpose would bring the Borg into existence? Where did they start? If [Ronald] doesn’t get a satisfying cup of coffee soon, we may find out.

We covered the first iteration of his brewing machine in 2013. We like to imagine that he’s spent many sleepless, heavily caffeinated days and nights since then to arrive at version 2. This version is a mechanical improvement over his original Rube Goldberg contraption. On top of that, it has improved electronics and code, with a color screen reminiscent of industrial control panels.

He’s also working on something called, “AutoBaristaScript(TM),” which attempts to hold the entire universe of pour-over coffee within its clutches. We don’t know when he’ll stop, but when he does finally create that perfect cup, what’s left of the world will breathe easier. They’ll also drink good coffee.

 

Editor’s Note: The Borg do not necessarily want to assimilate all sentient life as an end unto itself. The Kazon were deemed unworthy of assimilation (VOY: Mortal Coil). The Borg are driven towards perfection, accomplished by adding technological and biological distinctiveness to their own.

Hacklet 120 – Coffee Hacks

Hackers need fuel to hack. In general that fuel comes in the form of food, water, and caffeine. Not necessarily in that order. While soda or energy drinks will do in a pinch, the best hackers know that the purest form of caffeine comes from coffee. This of course means that there have been decades of coffee hacks. The first Internet-connected coffee pot dates all way back to 1991, before the web even had pictures. We’ve come a long way since then. This week on the Hacklet we’re checking out some of the best coffee hacks on Hackaday.io!

coffee1We start with [opeRaptor] and CoffeeOfThings. [OpeRaptor] has created a wireless, internet connected coffee carafe. The carafe has three CdS cells which enable it to detect how much black gold is left in the pot. A TMP36 sensor reports the current coffee temperature. Data is sent out via a NRF24l01 radio. The brains of the coffee pot is an MSP430 microcontroller. All this runs from a simple CR2032 coin cell. A base station receives the coffee data, displays it on a very nice Vacuum fluorescent Display (VFD). An ESP8266 then passes the data on to the internet.

 

coffewarmerNext up is [magnustron] with quad-386 coffee heater. No one likes a cold cup of coffee. Everyone loves old CPUs. [Magnustron] turned these two shower thoughts into a the world’s first USB powered quad CPU coffee warmer with data logging capabilities. A simple ATtiny461 micro runs the show. PC connectivity is via USB using the V-USB library. [Magnustron] has gotten the CPUs to warm up, but is having some issues with switching. them on. Turning all four heaters on too quickly causes the rail to droop, leading to dropped USB connections. Those power-hungry 386 chips may be a bit too much for a single USB connection. It might be time to add an external power supply.

groundsNext is [kesh1030] with Using Waste Coffee As A Biodiesel Source. Coffee isn’t just liquid energy. There’s oil in them there grounds. Millions of pounds of used coffee grounds produced every year can be converted to biodiesel fuel. [Kesh1030] experimented with different coffee grounds, and different ways to prepare them. The oil was extracted from the coffee using hexane, which is a bit of a nasty solvent. [Kesh1030] used a fume hood to stay safe. He found that homogenized coffee grounds had an 11.87% oil yield. Used homogenized coffee grounds weren’t far behind, with 9.82% yield of oil. Nearly 10% per weight yield isn’t too shabby, considering this is all going into the trash.

dripperFinally, we have [saadcaffeine] with Caffeinator: gravity powered geek fuel dripper. This is a project of few words, but the images tell much of the story. [Saadcaffeine] created his own cold drip iced coffee maker using upcycled and found components. Three clothes hangers form an ingenious tripod. The tripod holds two soda bottles – the water reservoir and the brew pot. Water is restricted by small holes in the soda bottle caps. This allows it to drop slowly though the machine, giving it time to soak up all the caffeinated goodness. The result is a fresh cup of cold drip. Just add ice and enjoy a quick power up!

If you want to see more coffee hacks, check out our new coffee projects list. See a project I might have missed? Don’t be shy, just drop me a message on Hackaday.io. That’s it for this week’s Hacklet, As always, see you next week. Same hack time, same hack channel, bringing you the best of Hackaday.io!

Hackaday Prize Entry: Wirelessly Charged Self-Heating Coffee Mug

Many productive hackers bleed a dark ochre. The prevailing theory among a certain group of commenters is that they’re full of it, but it’s actually a healthy sign of a low blood content in the healthy hacker’s coffee stream. [Bharath] is among those who enjoy the caffeinated bean juice on a daily basis. However, he’d suffer from a terrible condition known as cold coffee. To combat this, he built an app-enabled, wirelessly chargeable, self-heating coffee mug.

We know that most hackers don’t start off planning to build objects with ridiculous feature lists, it just happens. Is there an alternate Murphy’s law for this? Any feature that can be added will? The project started off as some low ohm resistors attached to a rechargeable power bank. A insulated flask with a removable inner stainless steel lining was chosen. The resistors were fixed to the outside with a thermal epoxy.

However, how do we control the resistors? We don’t want to burn through our battery right away (which could end up more literally than one would like), so [Bharath] added a Linkit One microcontroller from Seeed Studio. With all this power at his disposal, it was natural to add Bluetooth, a temperature sensor, and app control to the cup.

After getting it all together, he realized that while the insides were perfectly isolated from the liquids held in the flask under normal use, the hole he’d have to cut to connect to the charging circuit would provide an unacceptable ingress point for water. To combat this he added the wireless charging functionality.

With his flask in hand, we’re sure the mood boost from not having to slog through the dregs of a cold container of coffee will produce a measureable improvement in productivity. Video after the break.

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