Cocktail Cabinet To Be Proud Of

At a glance you might think it’s the real thing, but if you look closer you’ll see that The Distraction Contraption is an extremely well-executed cocktail cabinet recreation that hosts a MAME setup. [Sam Freeman] took pictures of the entire build process and has posted them, along with captions, as a Flickr collection.

The project started after some inspiration from this diminutive cocktail cabinet. He wanted his own version that was closer in scale to the coin-op versions that would have been found in bars a few decades ago. He designed the case to fit a 17″ LCD screen using Google Sketchup. From there, he cut out the parts and routed the edges. The controls feature buttons and joysticks, as you’d expect, but that red cap on the end works as a spinner. He tried out a few different ideas for this auxiliary control. He found that using LEGO gears to map the spinner’s motion to the axle of a mouse worked best. To give the plastic knob a better feel he loaded it with pennies to increase the mass, bringing momentum into play. The final look was achieved using wood-grain contact paper, and custom printed skins.

Atmega Analog Two Pack

Back in February, [ProtoStack] posted a pretty good tutorial on how to do Analogue to Digital Conversion on an Atmega168. Based on a bread board, the tutorial also shows the often forgotten low pass filter on the AVCC lines to ensure an extra stable reference and an analog input connection to a simple voltage divider as a study point.

Moving on into the micro controller, the registers you’re going to need to twiddle are laid out and explained in detail. Finally you’re shown how to put it all together in a software project that outputs the analog reading onto a standard character LCD.

But hold on! There is more. Just released is a follow up to that tutorial which adds on Analogue to Digital Conversion Interrupts on an Atmega168A. So if you’re sitting there looking at an Arduino and want to know more about what’s going on under the hood, these are a good place to start.

Redeye Printer Interface

This handy printer interface started out as a request on our very own forums when forum member [victorf] needed some output via thermal printers. He had scored a number of HP82240B thermal printers intended for use with HP calculators, but of course they used the somewhat arcane HP protocol first drafted in the 1960’s and needed some help.

Fellow forum member [wireb] started to look into it, found out it uses a standard 32KHz carrier signal, and started asking questions about its use. Grabbing a pdf of the manual he was able to find out all the details to what the printer was expecting in the form of communications.

After a few weeks, [wireb] was able to make a convenient, logic level serial to HP-IR adapter based around a PIC16F1824 who’s firmware supports 9600 8N1 or 2400 8N1 speeds, ASCII text, and the printer’s “advanced” graphical modes via escape sequences.

If you have not checked out our forums yet we suggest you do!

Retrofitting LCD Projectors With High-powered LEDs

highpower_led

[Devon] recently repaired a handful of Phillips LCD projectors which he was quite excited to use. The only problem is that he didn’t want to mess with replacing the bulbs after every 2000 hours of use at $100 apiece. He was pretty confident that he could find a better way to drive the projectors, so he disassembled them once more and started looking around for bulb replacements.

He figured that a high-powered LED would do the trick, so he ordered a handful of parts and went about his first retrofit. Using his oscilloscope, he found that the control board pulses the high voltage board when the projector is powered on, and continues to pulse a signal until the machine is turned off. At this point, the HV board powers down the bulb.

He created a small circuit using a PIC that is used to interpret the initial pulse from the control board as well as watch for the steady “heartbeat” pulses that occur while the projector is powered on. This board is used to control the driver board for the high-powered LED he purchased.

His bulb replacement works well as far as color fidelity is concerned, but is not nearly as bright as he hoped for. He has plans to source some far brighter LEDs or automobile HID lighting in the very near future, and we look forward to seeing if he can match the brightness of the original bulbs.

Class Up Your Next Party With The Drink Making Unit 2.0

drink_making_unit_20

The crew over at [Evil Mad Scientist Laboratories] has been hard at work preparing for the Barbot 2011 cocktail robotic exhibition. This year, they are packing some serious drinking fun with the Drink Making Unit 2.0. The predictably named follow-up to last year’s wildly popular Drink Making Unit doubles the mixing capability with six, rather than three fluids, and provides a visually stimulating drink mixing experience.

While they are similarly named, the new unit has been completely redesigned since last year. No longer are they relying on breast pumps to move the alcohol along. Instead, they are using compressed air to dispense fluids from wash bottles which were constructed from laboratory beakers. The fluids are measured in specially altered graduated cylinders that are designed to tip over and release their contents when the appropriate amount of alcohol has been poured. These cylinders are designed to mimic the movement of Japanese garden fixtures called “deer chasers”, tipping back and forth solely powered by the ingress and egress of liquid.

The dispenser’s control panel houses an ATmega164, which orchestrates the entire operation. It interfaces with the LED driver boards that make up the display via SPI. The micro controller is also tasked with monitoring when the graduated cylinders tip their libations into the dispensing funnel, which is done using IR LEDs and photogates.

It’s a great looking machine, and while there isn’t any drink mixing video as of yet, we can’t wait to see it in action.

Kinect Hack Makes April Fools’ Prank A Reality

gmail_motion

Unless you have been hiding out in a cave for the last week or so, you have heard about this year’s April Fools’ joke from Google. Gmail Motion was purported to be an action-driven interface for Gmail, complete with goofy poses and gestures for completing everyday email tasks. Unfortunately it was all an elaborate joke and no gesture-based Gmail interface is forthcoming…at least not from Google.

The team over at the USC Institute for Creative Technologies have stepped up and made Google’s hoax a reality.  You might remember these guys from their Kinect-based World of Warcraft interface which used body motions to emulate in-game keyboard actions. Using their Flexible Action and Articulated Skeleton Toolkit (FAAST), they developed a Kinect interface for Gmail which they have dubbed the Software Library Optimizing Obligatory Waving (SLOOW).

Their skeleton tracking software allows them to use all of the faux gestures Google dreamed up for controlling your inbox, however impractical they might be. We love a good April Fools’ joke, but we really enjoy when they become reality via some clever thinking.

Stick around for a video demo of the SLOOW interface in action.

[via Adafruit]

Continue reading “Kinect Hack Makes April Fools’ Prank A Reality”

RFID Drink System Eliminates The Need For Change

popcard_vending_machine

[Avatar-X] snagged a drink vending machine online a few years back, and has been selling drinks to his neighbors ever since. People are always asking him for change, and just the other day he was thirsty and out of change himself.  He considered adding an override key so that he could snag free drinks whenever he pleased, but decided to go all out and built a cash card system instead.

He didn’t know how to interface with the machine’s logic board, so after poring over the service manual he consulted with a support rep from the company that manufactured it. Luckily, he was able to get enough information from them to start making some headway. With his friend’s assistance, he was able to figure out which pins on the Bill Validator Interface needed to be shorted in order to simulate the addition of funds.

Using an Arduino with an Ethernet shield, LCD display, and an RFID reader, he had his PopCARD system up and running in no time. Now all his neighbors have to do when they want a drink is swipe their card in front of the machine and hit a button to add funds from their account.

As you can see in the video below it works great, and we’re sure his neighbors are pleased with the improvements he has made.

Continue reading “RFID Drink System Eliminates The Need For Change”