Posts with «coffee» label

An inexpensive device for analyzing roasted coffee beans

While you may not consider in detail how your coffee is roasted, those that produce it must pay special attention to make sure that the end product is consistent. Equipment to help analyze roasted coffee is normally quite expensive, but using a near-infrared sensor, Arduino Uno and Bluetooth module, Spencer Corry was able to make his own analysis setup.

As shown in the video below, after calibration, beans are inserted into the analysis chamber using a tryer scoop. Light is shined onto the roasted beans, and the intensity of the reflected near-infrared radiation is analyzed in six different wavelengths. Intensity data is then transmitted via Bluetooth to a smart device, which can be used to make sure things are roasted perfectly.

There has recently been a growth of small roasting companies offering custom in-house roasts. These companies are looking for less expensive alternatives to hiring and training a roast master or using the expensive Agtron Process Analyzer. The Degree of Roast Infrared Analyzer for Coffee Roasters, as described in this document, is meant to be an inexpensive means of measuring the degree of roast of coffee beans. The Degree of Roast Infrared Analyzer uses a tryer, a tool found on coffee roasters used to sample the coffee during roasting, to hold a sample of coffee. The tryer is inserted into the analyzer where the AS7263 NIR Spectral sensor is used to measure 6 different infrared bands (610, 680, 730, 760, 810, and 860nm). The reflectance measurements are transmitted via Bluetooth and can then be correlated to the degree of roast. The analyzer must first be calibrated by pressing a button on the inside of the box in which the PVC is used as a white balance as it has a relatively flat reflectance in the spectral range detected by the sensor.

Brasilia Espresso Machine PID Upgrade Brews Prefect Cup of Energy

Coffee, making and hacking addictions are just bound to get out of control. So did [Rhys Goodwin’s] coffee maker hack. What started as a little restoration project of a second-hand coffee machine resulted in a complete upgrade to state of the art coffee brewing technology.

The Brasilia Lady comes with a 300 ml brass boiler, a pump and four buttons for power, coffee, hot water and steam. A 3-way AC solenoid valve, wired directly to the buttons, selects one of the three functions, while a temperamental bimetal switch keeps the boiler roughly between almost there and way too hot.

To reduce the temperature swing, [Rhys] decided to add a PID control loop, and on the way, an OLED display, too. He designed a little shield for the Arduino Nano, that interfaces with the present hardware through solid state relays. Two thermocouples measure the temperature of the boiler and group head while a thermal cut-off fuse protects the machine from overheating in case of a malfunction.

Also, the Lady’s makeup received a complete overhaul, starting with a fresh powder coating. A sealed enclosure along with a polished top panel for the OLED display were machined from aluminum. [Rhys] also added an external water tank that is connected to the machine through shiny, custom lathed tube fittings. Before the water enters the boiler, it passes through a custom preheater, to avoid cold water from entering the boiler directly. Not only does the result look fantastic, it also offers a lot more control over the temperature and the amount of water extracted, resulting in a perfect brew every time. Enjoy [Rhys’s] video where he explains his build:

Thanks to [Pirate14] for the tip!

Filed under: cooking hacks, home hacks

Build a Behemoth Cold Brew Coffee Drip Tower

You can buy large cold-brew towers, but they’re very expensive, aimed at coffee shops. Instead you can make your own automated tower that uses arduino.

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The post Build a Behemoth Cold Brew Coffee Drip Tower appeared first on Make: DIY Projects and Ideas for Makers.

This Machine Prints Portraits with 8,000 Drops of Coffee

This x-y plotter uses coffee drips — each carefully calibrated for size and height — to create these portraits.

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The post This Machine Prints Portraits with 8,000 Drops of Coffee appeared first on Make: DIY Projects and Ideas for Makers.

Redundant Automated Water Filler For Your Coffee

We’ve always wondered why we have indoor plumbing if it isn’t hooked up to our coffee pots. We probably drink as much coffee as water anyway, so why not just hook up a water line to refill the pot? [Loose Cannon] aka [LC] has been working on just that problem, with a whole lot of extra features, creating a very robust automatically-filled, gravity-fed, vacuum-sealed water tank for whatever appliance you have that could use it, including your coffee pot.

[LC] tapped into the 1/4″ water line from the ice maker, which has the added bonus of being a common size for solenoid valves. He’s using an eTape sensor to measure the water level in the reservoir, but he ALSO is using a flow meter in the line itself to double-check that the reservoir won’t overflow. The flow meter allows a hard limit to be set for the maximum amount of water allowed into the tank. He’s used an Arduino Micro to tie the project together, which also handles a real-time clock so the tank can be filled on a schedule.

The tank that [LC] was trying to fill was vacuum-sealed as well, which made things a little trickier. Without a vacuum on the tank, the water would just run out of the overflow valve. This is an interesting project that goes way beyond the usual automatic water supplies for coffee pots we’ve seen before.

Filed under: home hacks

Coffee Payment System Doesn’t Void Your Warranty

[Oliver] is back with an update to his recent coffee maker hacks. His latest hack allowed him to add a coffee payment system to an off-the-shelf coffee maker without modifying the coffee maker itself. This project is an update to his previous adventures in coffee maker hacking which logged who was using up all of the coffee.

The payment system begins with an Arduino Uno clone inside of a small project enclosure. The Arduino communicates with the coffee maker via serial using the coffee maker’s service port. This port is easily available from outside the machine, so you won’t have to crack open the case and risk voiding your warranty.

The system also includes an RFID reader and a Bluetooth module. The RFID reader allows each user to have their own identification card. The user can swipe their card over the reader and the system knows how many credits are left in their account. If they have enough credit, the machine will pour a delicious cup of coffee.

The Arduino communicates to an Android phone using the Bluetooth module. [Oliver’s] Android app was built using MIT’s app inventor. It keeps track of the account credits and allows the user to add more. The system can currently keep track of up to forty accounts. [Oliver] also mentions that you can use any Bluetooth terminal program to control the system instead of a smart phone app.

Filed under: Arduino Hacks
Hack a Day 28 Dec 03:01

New Project: Coffee Cup Spy Cam

Take your cup of Joe from classic to classified with a tilt-triggered spy camera. The trick is to modify two paper coffee cups — install the device in one, slide it into the second, and align holes cut in the bottoms of each. Two LEDs can be seen through the […]

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Two steampunk espresso machines running on Arduino Mega

There’s a team of designers based in Korea who are passionate about coffee machines. Their name is Vidastech and recently shared with us two new hand-assembled machines prototyped  with Arduino Mega called Hexagon and Revolucion.

Take a look at the gallery for more pictures:


Arduino Blog 22 Jul 15:50

An Arduino-enhanced espresso machine: the “Naked Espresso”

Reborn is an australian digital creative agency whose mission is to design smart and innovative ideas.
Among their works, a very nice one regards a hack consisting in the re-engineering of a sofisticated espresso machine, to show its peculiar features in the process of coffee making.
By means of an Arduino board, the team can collect real-time information such as flow rate, temperature and pressure; then, a Processing sketch graphically presents this data to the user in an artistic fashion.
Finally, each cup of coffee made this way is decorated with an artwork summarizing this information in its own “personal identity”.
More information can be found here.

[Via: The Naked Espresso]

Text-Enabled Espresso Machine Prints Your Phone Number on the Foam

[Video Link] Kelsey Klevenberg of the cloud texting service Zipwhip says:

We made the Textspresso machine to show off our cloud texting technology. It’s a robotic coffee machine. It utilized java script, 3 arduino microcontrollers, a couple servos, an ikea cupboard, and about 100 other pieces. We think it’s great. We’re open sourcing the plans in the coming weeks.

MAKE » Arduino 06 May 22:47
arduino  coffee