Tea-bagging An Arduino

December 17, 2012 by Mike Szczys 35 Comments

tea-bagging-arduino

[Dmitry Narkevich] likes a strong cup of tea and his method of getting there is to oscillate the tea bag as it steeps. But why take the time to do this when you can make an Arduino brew your tea for you. As you can see, he rigged up a system to move the tea bag as it steeps in his metal bottle.

The motion is provided by a hobby servo connected to an Arduino. This makes timing the process very simple and we’d imaging it’s only a matter of time before he adds an alarm so he’ll know when it’s ready. But the real hack comes in the apparatus that connects the servo to the bottle. Since he’ll be drinking out of it the assembly needs to be easy to remove and should be able to stand up to the abuse of being clamped on and taken off a few times each day.

The base of the device is a guitar capo. This is meant to gently clamp to the finger board of a guitar using spring tension so it is already covered in rubber which gives it a firm grip on the bottle’s opening. The servo is connected to a metal part from a stapler, and the string drapes over the body of a disposable pen. Don’t miss this in action in the clip after the break.

If you don’t have a servo on hand you could try using the sled from an optical drive.

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Design A Gingerbread House In CAD, Then Cut Pieces With A Laser

December 7, 2012 by Mike Szczys 15 Comments

This is one of those ideas that’s so simple we can’t believe we haven’t heard of it before now. [Johan von Konow] is upping his holiday decorating game this year by designing his Gingerbread House in CAD and cutting it out on a laser cutter. If designed well this will easily allow you to increase the complexity of your design by orders of magnitude.

We remember making Gingerbread Houses with mom when we were little. She would bake a sheet of gingerbread, then pull out stencils she had made from file folders to carefully cut the walls and roof of the houses. But these were the homesteading equivalent of candy construction — one room consisting of four walls and two roof pieces. [Johan’s] design uses roofs with multiple pitches, dormers, and an entryway off the front of the main building. Quite impressive!

He mentions a few things to keep in mind. The gingerbread should be an even thickness for best results. You’re also going to want to plan for ventilation during cutting and give up the idea that you might eat the house when the holidays are over. The cutting process creates quite a stink and leaves a horribly burnt taste in the baked goods. Of course you could always cut out templates and use a knife when working with food.

Skittles Sorting Machine Sorts Skittles, Keeps The Band Happy

November 5, 2012 by Brian Benchoff 25 Comments

In 1982, Van Halen had the biggest stage show around. Their rider – a document going over the requirements for the show – reflects this. In the middle of the requirements for the lighting and sound rigs, Van Halen placed a rather odd request; one (1) bowl of M&M, (ABSOLUTELY NO BROWN ONES). The theory being if the request for no brown M&Ms wasn’t followed, the lighting and sound rigs probably weren’t up to spec either.

It’s not M&Ms this time (they wouldn’t fit in the machine), but [egenriether] came up with a seriously clever solution for sorting Skittles by color. Why? We have no idea, other than, ‘just because.’

The build details are a little scant, but we know [egenriether] used a BASIC Stamp 2 for the electronics portion of the build. To sort the Skittles by color, a TAOS RGB color sensor reads the red, green, and blue values for each Skittle and actuates a servo that guides each piece of candy into its respective bowl.

It’s a very, very cool, if completely useless build. Still, we’re thinking it could be put to use if [egenriether] is ever backstage setting up before the band arrives.

Videos after the break. Thanks [Andrew] for sending this one in.

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Automate Your Tea Time

October 22, 2012 by Mike Szczys 14 Comments

There are a couple of things that go into a great cup of tea. One is to have the water at the correct temperature, the other is to steep for just the right amount of time. This offering solves the latter by extracting the tea bag after a carefully timed steep.

It’s hard to imagine how this could be more simple. The timing mechanism is a cheap egg timer which has been modified to include a paperclip which moves with the minute hand. When the timer hits zero that paper clip contacts a stationary electrode, which powers the motor. That motor is the laser sled from a dead CD-ROM drive. Since these usually die because of the lens (not the mechanism) this is a great re-use of the internals. The sled zips to one side until it hits a limiting switch which kills the power. At the same time, this motion uses the wooden lever to extract the tea bag. All of this is explained in the clip after the jump.

Since the egg timer already has its own bell, you’ll even be alerted that it’s tea time!

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Red-bullet: Cooking Stove From Cans, Fueled By Gas Additive

October 19, 2012 by Mike Szczys 25 Comments

A couple of beverage containers and a little bit of fuel additive bring together this aluminum can stove project. When lit it shoots flames out each of those holes around the top to heat the vessel resting upon it. [Peter Geiger] calls it the Red-Bullet because one of the stove pieces started as a Red Bull can and the other piece was a Coors (aka silver bullet).

This is basically an alcohol stove. We remember seeing a very well designed version of the penny stove several years back. This is different as it uses a side burner so the stove itself functions as the kettle stand. [Peter] started by cutting the Red Bull can just a bit taller than the final height. He then inserted the top portion of one of those aluminum beer cans that are shaped like glass bottles. The neck was lopped off and inverted. It is joined with the other can base using JB weld and by rolling the aluminum in on itself. After that has dried the holes are added and it’s filled with HEET from a yellow bottle. This gasoline additive is meant to sequester water and keep your gas line from freezing. The yellow bottle is mainly alcohol, the red is methanol so make sure you use the right one!

Building A Better PID Smoker Controller

October 11, 2012 by Mike Szczys 20 Comments

[Matt] wanted to have more control over his meat smoker so he built this advanced PID smoker controller. It uses the solid state relay seen in the bottom-right of this image to switch the smoker’s heating element. But all of the other goodies that are included add several features not usually found in these builds.

This is a replacement for the commercial PID unit he used on the original build. That monitored the temperature in the smoker, using predictive algorithms to maintain just the right heat level. But this time around [Matt] is looking for extra feedback with a second sensor to monitor meat temperature. Using an Arduino with an SD shield he is able to data log the smoking sessions, and his custom code allows him to specify temperature profiles for resting the meat after it has hit the target temperature. It kind of reminds us of a reflow oven controller… but for food.

How To Make That Old Satellite Dish Cook All Your Meals

September 27, 2012 by Mike Szczys 29 Comments

Grab that old satellite dish out of the dark corner of you garage and get those hot dogs ready. [Share alike license] is going to show us how to turn the dish into a solar cooker.

Harnessing the sun’s power requires a reflective surface. Although the image above makes it look like a mirror finish, this is really just covered in foil tape. This is what’s used to seal duct work and can be had for a few bucks at any home store. You’ll notice the dish is pointed up quite a bit more than it would have been when receiving satellite television. The mount on the back of the dish has been turned 180 degrees to allow for this. You want the rays to be focused on the bottom of the cooking area instead of the side and this will do the trick. A small grate was added just below the pinnacle of the receiver tripod. For now it has only been used to boil a pot of water. We’d like to see it grilling up some dogs but you’ll have to figure out a way to catch the drippings. We wonder if a transparent baking pan would block too much of the heat energy?

This is a great way to add purpose to neglected equipment. But if you’re serious about solar cooking you need something more along these lines.