Hackaday Alum [Nick Schulze] decided to help out a friend who needed a controller to hold water at a precise temperature. Coffee guzzling hackers of the world should rejoice, as [Nick] targeted a coffee urn as the vessel for the project. What he came up with was a couple of custom boards and a roll-your-own temperature probe which does a fantastic job of regulating the temperature of the liquid.
Needing to switch the mains going to the heating element he immediately thought of an AC chopper circuit based on a Triac. What didn’t come to mind immediately was the need to detect the zero crossing. In the image above you can see nearest the urn his high voltage board. Below that is the zero crossing detector circuit. For feedback he created his own temperature probe using a TC1047 temperature sensor. After soldering on a filtering cap and the leads he dipped it in JB Weld to make it water tight. If you’re using this for coffee may we recommend seeking out a food safe probe.
After successful testing he added a user interface and buttoned it up in the enclosure seen in the video below.
Continue reading “Precise temperature control of a coffee urn”
[Armin] and his crew at BerkelaarMRT were contacted by the Museum of Communication in The Hague to see if they could build a coffee machine that was operated only by voice. It sounded like an interesting challenge, so they took on the job and came up with a very awesome interactive coffee machine.
The interactive coffee machine is based on a coffee maker made by Animo with the ability to make cappuccino, espresso, or just a straight coffee. The electronics are based on a Motorola Xoom 10″ tablet with an Electric Sheep module from Sparkfun. This, along with a custom-made PCB with optocouplers, to allow the buttons on the coffee maker to be electronically activated.
When anyone walks up to the coffee machine, a Maxbotix sonar module detects their presence and a small animated coffee cup asks what they’d like to drink. The cute little cup then prepares the drink and waits for its next human.
There’s a video of the machine in action available below. it’s in Dutch, but anyone will be able to get the jist of how the animated coffee machine operates.
Continue reading “A coffee machine with an attitude”
A coffee machine that brews a fresh pot of joe, automatically putting coffee in a filter, filling the coffee maker with water, brewing, dumping the grounds, and adding sugar and cream, all without any human interaction. Some may call it the fevered dream of a madman. Others may call it a vending machine. All we know is [Phil] is working on his own version of this robot par excellence.
This is only phase one of a robotic coffee machine build, but so far [Phil] has a single cup coffee maker that can fill itself with water and dump its grounds automatically.
The electronics are based on a PIC18F4550 that controls two mechanical relays that control the solenoids, one solid state relay that controls power to the coffee maker, and two stepper motor drivers that open the lid of the coffee maker and dump the filter into the wash bin.
It’s an awesome build and we look forward to the next stage of this awesome, truly homebrew build.
[TE] goes camping, and on his excursion he likes to take just the bare necessities. A sleeping bag, a tent, food, but above all else, coffee. Most camping coffee makers are a percolator design, which is widely regarded as the worst way to make coffee ever. With a little bit of ingenuity, he created an improvised drip coffee maker for camping, just the thing for a nice cup of brew in the wilderness.
If you were to make your own drip coffee maker, your first inclination might be to use a funnel, put in a filter, pour in some coffee, and load it up with hot water. This was [TE]’s first design, but he quickly realized the hole in the bottom of his makeshift funnel would clog very quickly. After investigating his electronic drip coffee maker, he discovered the bottom of the basket had a series of baffles that allowed the filter to drain over its entire bottom surface. But how to replicate this in a piece of DIY equipment?
The solution came from [TE]’s wife, who pulled out an apple slicer. This allowed the filter to sit a little proud in the basket, allowing for an efficient draining of coffee. Simple, effective, and nearly impossible to break; that’s very good camping equipment.
Continue reading “A drip coffee maker for camping”
Handmade coffee is a feature we need to write. But for now we present this copper kettle which is designed to pour out the boiling water very slowly in order to achieve the perfect cup of slow-drip java.
[CHS] made the kettle for his friend [Nate]. The entire process starts off with an arc of flat copper sheet which makes a slightly conical cylinder when curved until the two ends meet. Getting a water tight seal on this seam is imperative and it took four or five tries to reach perfection.
To get the kettle in shape [CHS] improvised a mandrel out of a thin slice of railroad track. After polishing it smooth it goes on the inside of the copper and gives him something to hammer against. We think this step is magic… It’s kind of like the old sculpting adage that you remove everything that isn’t what you’re trying to end up with. The beauty of the piece really pops out as the final curves are hammered into the work.
Continue reading “Copper kettle just for the hipster coffee scene”
This hack makes your Keurig experience fully automatic. For those that aren’t familiar with the hardware: this type of coffee maker includes a water reservoir. Coffee is brewed One cup at a time by drawing from that water, quickly heating it, then forcing it through disposable pods containing coffee grounds and a filter. This takes the user-friendly design one step further by automatically keeping the water full.
This goes beyond the last water reservoir hack we saw. That one routed a water line to the machine, but included a manually operated valve. [Eod_punk] added a solenoid valve and level sensor in this project. The level sensor is submerged in the tank and is monitored by a Basic Stamp microcontroller. When the level is low the BS1 drives the solenoid via a transistor, letting the water flow. This is all shown in the video below.
Continue reading “Keurig hack now automatically fills the water reservoir”
We were skeptical about Keurig machines when we first heard about them. Although we still scoff at the added waste of throwing away a plastic container of used grounds for each cup of coffee made, we tried one at the in-laws and it does brew a great cup of Joe. One of the draws of the machine is that it does it pretty much automatically as long as you fill it with water first. [Joseph Collins] is even taking the work out of that by adding a water supply line to his Keurig.
His coffee maker sits right next to the fridge, which has its own water supply. So one day he thought, why not run a line to the coffee maker as well? As far as plumbing projects go it’s very simple. He pulled out the refrigerator and added a T-fitting to split the water supply line. From there he ran an extension next to the coffee maker that terminates with a valve being pointed to by the arrow in the lower left. The plastic supply line leaving the valve passes through a rubber grommet in the lid of the water reservoir pointed to by the other arrow.
[Joseph] figures the whole project came in at under $30 and shows how he did it in the clip after the break.
Continue reading “Keurig hack runs a water supply line to your coffee maker”