[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.
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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.
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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.
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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.
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Here’s a fun way to break up the monotony in the old cubicle farm. The Mug Plotter will let you expertly inscribe your coffee vessel with a different witty saying or design for each day of the week. If it looks familiar that’s because it’s loosely based on the non-flat drawing robot, the Egg-Bot.
[Teed] built the machine using laser cut plywood parts. He starts off the build description with the griping technique. There are two parts to this, one is concave and fits in the mouth of the mug. The convex side grips the bottom edges of it. These parts go on the frame along with the slide and thread rods which hold the stylus. A servo motor is along for the ride, providing the ability to lift the marker when necessary.
You can see in the clip after the break that there’s a bit of oscillation in the rig when one of the steppers starts turning really fast. But it doesn’t seem to affect the look of the design very much at all.
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Senseo coffee makers are automated brewers that use coffee pods. [Ronald] had one, but wasn’t satisfied with the quality of the coffee it produced. His solution was to hack it apart and build his own automatic coffee machine with the innards.
The coffee brewing part of the system is controlled by an ATmega8. This reads the temperature using the NTC sensor from the original machine and actuates the various parts of the Senseo machine, and the added grinder. The timing was all done by trial and error, optimizing for the best cup of coffee.
Keeping with the trend of adding Raspberry Pis to everything, [Ronald] connected one to this build for remote control. He runs a very hacked version of LCD2USB which deals with communicating with the RPi. An Apache web server hosts a PHP script to provide a user interface, which runs a C program to tell the system to start brewing.
Unfortunately, [Ronald] didn’t give us a link to his web interface, so we can’t remotely brew him coffee. However he did provide all of the source for the project in his write up.
This is what your coffee looks like as it is being brewed. The three different art pieces seen above were generated based on data from different parts of a high-end coffee maker. This isn’t a bargain basement single switch drip maker (we reserve those for NES retrofits) but a top-of-the-line espresso machine. And before you cry foul we’ll warn you that the project is a marketing device for the manufacturer. But we still think it’s interesting so read on or jump directly to the video after the break.
We’re unsure if the sensors are normally included in the machine or if they were added during the hack. An Arduino pulls in data about the brew process from two flow meters, a steam indicator LED, and three thermistors. The measured values are sent to a Processing application which turns them into the generative art seen above. What results is a widescreen display that aims to turn your bleary-eyed wait for morning coffee into something interesting.
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