Mixed I/O Testing Module

February 8, 2011 by Mike Szczys 7 Comments

Needing to test the display interface for a multitude of different sensors [Fileark] built himself this analog and digital input/output simulator. Along the bottom is a double row of trimpots that adjust analog voltages. Each voltage is measured by the Arduino inside and its value is displayed on the graphic LCD screen to confirm that the hardware you’re testing is making correct measurements. There’s also digital I/O in two different forms. To the upper left are momentary push buttons but the DIP switch bank below that allows the same connections to be toggled on and off. It’s not an automated test bed, but if you’ve got a lot of I/O, or a lot of hardware to test this will save you some real time.

Don’t miss the demonstration video after the break.

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Replace An N64’s Worn Out Joystick

February 8, 2011 by Mike Szczys 24 Comments

As gaming consoles age the controllers will inevitably show some wear, and sadly may give out all together. [Kyle] couldn’t bear to watch his Nintendo 64 controller bite the dust so he replaced the thumb stick with one from a PlayStation. This is a bigger job than you might imagine because the two parts are fundamentally different. The original N64 stick uses a rotary encoder to output data to the control chip, while the PlayStation stick is an analog device. [Kyle’s] solution was to read the analog values using a PIC, but lower in the thread you can read about another user who pulled off a similar hack using an AVR. Both convert the signals into the rotary encoder format that the N64 chip is listening for. From the looks of the clip embedded after the break, this couldn’t work any better!

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IPhone Tilt Motion Controller

January 7, 2011 by Mike Szczys 18 Comments

Here’s a mounting system that adds mechanical tilt control to the iPhone (link dead, try the Internet Archive version). It uses two servo motors to rotate along the X and Y axes. An analog joystick is used along with an Arduino to control the movement of the apparatus. As you can see in the video after the break, this works quite well when playing accelerometer-based games. But adding a joystick isn’t the end-goal of the project. [Shane] plans to point a camera at the iPhone and use image recognition to play games automatically. That sounds like a big bite the chew but we’ve seen this work with Guitar Hero so we’re optimistic.

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Segfault: Balancing Transport Using A Dozen Op-amps

December 10, 2010 by Mike Szczys 15 Comments

The Segfault is a balancing transport similar to a Segway, but it uses analog comparators instead of digital circuitry. On board you’ll find no less than twelve LMC6484 op amps. They take signals from the gyroscope and the accelerometer, balance and filter them, then drive the motor h-bridges accordingly.

[Charles], the guy behind the Segfault, is also the one responsible for DeathBlades. As with that project he does just as well at documenting as he does at fabrication. Take some time to enjoy his posts associated with this two-wheeled-wonder (especially the build process) and then watch in the video after the break.

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Building A Bandwidth Meter

November 24, 2010 by Mike Szczys 15 Comments

Here’s an analog bandwidth meter made to look like an old pressure gauge. It’s actually new, but the paper showing the graduated scale was stained in a bath of black tea, then dried in an oven to give it an aged appearance. We think it’s quite effective.

The dial itself is a volt meter driven by an Arduino in much the same way as the multimeter clock. Bandwidth data is pulled from a Linux router, filtered down to the target data using ‘grep’, and sent over the serial connection by a Perl script. Since the meter itself is just waiting for serial data, alterations to the router’s scripting make it easy to represent a count of unread emails, tweets, or whatever data your code can scrape.

[Thanks Ben]

Arduino + Java + Joystick

November 19, 2010 by Mike Szczys 14 Comments

Interfacing your own hardware with a Java app couldn’t be easier than this example. [Pn] created this proof-of-concept using an Arduino, an analog joystick from a gaming controller, and a few lines of Java code. The Arduino reads an ADC value from the joystick’s x-axis and transmits it over the serial connection ten times a second. The Java program triggers on every serial event, parsing the data based on the @ symbol that the Arduino sends as a start and end condition.

We like this kind of example because there’s nothing extra involved. It lets you take the concept and run with it in any project imaginable. Be it a more complicated Joystick, or simple sensors that you’d like to interface with.

Monotron Openly Monophonic

November 10, 2010 by Joseph Thibodeau 17 Comments

Famous synth manufacturer Korg has released the schematics (get them here if you don’t like to fill out forms) for their wee little Monotron for all to see and use! This is great news for anyone looking to build up a synth from scratch or to circuit bend their existing monotron. The filter circuits alone would be fun to add to an existing electronics setup.

Granted there are already many examples of monotron mods out there, but that shouldn’t stop you from experimenting with your own variations. Now with the schematics you can make fundamental changes to the architecture of the synth all from the comfort of your own CAD software. Want more oscillators? Distortion? It’s all out there for you to explore. We’re very interested to see how far people will run with this. And big ups to Korg for recognizing the value of hacking!

[via Retrothing]

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