Automated Coffee Bean Roaster

November 5, 2009 by Caleb Kraft 29 Comments

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We’ve featured several different ways to roast coffee beans over the years. This is the next logical step. [Nightlife31] shows us how to use an Arduino and a popcorn popper to create a fully automated coffee bean roaster. You’ll have to modify your popcorn machine to be controllable. This means installing your temp sensor and relays. You can see a basic schematic for that in the project page. The rest involves making a fairly simple circuit on an Arduino protoboard attachment. The end result is quite nice. We wouldn’t mind waking up to some freshly roasted coffee beans in the morning. We’ve seen these done with PID controls, and directly controlled by a computer. There’s even this one that has a much more involved build with a convection oven mounted on top instead of a popcorn popper.

Easy Dial Telephone

November 1, 2009 by Mike Szczys 30 Comments

easy-dial-phone

[Taufeeq’s] Grandmother needed to be able to call her family members but due to ailing eyesight and memory this was a difficult task. He decided to help her with this by building a telephone that will auto-dial a number at the push of a button. [Taufeeq] built a case to hang on the wall which houses a hook for the receiver and two auto-dial buttons. The buttons are lighted and loosely based on the LED push buttons we covered in January. Housed in a separate box are a microcontroller and a dual tone multiple frequency IC used to dial the numbers. These are patched into a PCB from a standard telephone.

The result looks great and makes using the phone much easier with the simplified controls. We’ve included the demonstration video after the break.

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Arduino “python” Integration

October 30, 2009 by Phil Burgess 9 Comments

vivarium

[Cyberspice] informs us she likes snakes. Hey, who doesn’t? She’ll soon be adopting a lovely ball python and wanted to keep close tabs on the sensitive creature’s environment. To that end she assembled a network-enabled vivarium monitoring system based on Adafruit’s Boarduino (a minimalist Arduino clone), a TMP36 analog temperature sensor, Saelig’s WIZ810MJ Ethernet interface, and a common LCD screen. The Arduino rig periodically issues updates to a web server, which can then generate informative graphs using a set of PHP scripts (what, no Python?).

Okay, so we could probably count on one hand the number of readers in need of fancy reptile monitoring and still have fingers left over. There are countless other applications where networked sensor monitoring of this sort is a frequent necessity, so the article could be a good starting point for your own projects. There’s lots of source code to work with, on both the Arduino and web server sides. And the parts list demonstrates serious frugality: the Boarduino, the generic LCD, and especially the Ethernet interface; even with the breadboard adapter, this unit is about half the cost of the usual Arduino Ethernet shield, leaving more funds available for the snake food budget!

Halloween Props: Techy Jack-o-lanterns

October 29, 2009 by Caleb Kraft 10 Comments

[youtube=http://www.youtube.com/watch?v=UeYS_Tjf7pQ&feature=player_embedded]

Halloween is this weekend. If you still have some time and parts available, you might be looking to spice up your Jack-o-lantern. We’ve found a few projects that we thought might be nice to share. None of them would merit a post on their own, so we thought we would just round them up and share them all at once. They all appear to be powered by the Arduino, which we know will bring some comments. Just to clear up some questions, they don’t pay us to advertise Arduinos. People just do a lot of projects with them.

First, the silly string shooting Jack-o-lantern which you can see above. He’s using a single servo hooked to an Arduino and a motion sensor. When it detects motion, it lets out a short squirt of silly string. You can download the code from the project page. We might suggest you arrange this in a manner to avoid spraying directly into some kids eyes.

Check out the next two after the break.

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Mr. Wake, Wakes Up And Runs

October 28, 2009 by Caleb Kraft 12 Comments

[youtube=http://www.youtube.com/watch?v=Kdeqd-e0mjI]

[isotope] must really hate himself. He has built a torture device of pure evil. Mr. Wake, his alarm clock robot, should be considered a torture device. This cute looking little bot, with its bright and colorful clock and neat plastic tube frame is an alarm clock. As soon as it’s alarm goes off, Mr. Wake starts watching for you. If it detects your presence, it takes off, only to wait for you to stumble, bleary eyed, to its current location. Do you know what it does when you catch up to it? It takes off again. Why would you build a robot that you know you are just going to destroy in a groggy fit of animalistic rage?

We actually like Mr. Wake more than clocky, simply for its hackish feel. If you really really have problems getting up, you may want to consider something a little more drastic.

[via Makezine]

Halloween Props: Servo Eyes

October 26, 2009 by Caleb Kraft 13 Comments

[flickr video =http://www.flickr.com/photos/todbot/3991211183/]

If you’re wanting to spice up a Jack-o-lantern, why not give it some spooky eyes that will look around? [todbot] shows us how to set this up using an Arduino and 3 servos. His rig uses a hobby servo to control the entire head’s orientation and a smaller servo for each eye’s movement. Their motion is random, but quite convincing. He has them all stuck together with popsicle sticks, but you would probably move the location of the large servo to rotate the entire pumpkin, or whatever other prop you put it all in. You can download the Arduino sketch and give it a try your self. We might suggest building a simple rack and pinion rig to rotate both eyeballs with a single servo.

[via HackedGadgets]

Halloween Props: Alien Costume

October 26, 2009 by Caleb Kraft 13 Comments

alien

[creatrope] sent in this slick Alien costume that he made for his son. The costume does look decent, but not professional. For something tossed together from parts around the house, it looks fantastic. The real kicker, is the fact that it has the retractable inner mouth. The retractable mechanism is constructed from Legos and extends when his son opens the mouth. We think he did a fantastic job with this costume, but if you’re looking for something a little more polished, check out this Alien made by [Asy0uw1sh ] you can see a little more detail on how it works here.