LED and LCD displays are a technological marvel. They’ve brought the price of televisions and monitors down to unheard-of levels since the days of CRTs, but this upside arguably comes with an aesthetic cost. When everything is covered in bland computer screens, the world tends to look a lot more monotonous. Not so several decades ago when there were many sharply contrasting ways of displaying information. One example of this different time comes to us by way of this split-flap display that [Erich] has been recreating.

Split-flap displays work by printing letters or numbers on a series of flaps that are attached to a spindle with a stepper motor. Each step of the motor turns the display by one character. They can be noisy and do require a large amount of maintenance compared to modern displays, but have some advantages as well. [Erich]’s version is built out of new acrylic and MDF, and uses an Arduino as the control board. A 3D printer and CNC machine keep the tolerances tight enough for the display to work smoothly and also enable him to expand the display as needed since each character display is fairly modular.

Right now, [Erich]’s display has 20 characters on two different rows and definitely brings us back to the bygone era where displays of this style would have been prominent in airports and train stations. This display uses a lot of the basics from another split flap display that we featured a few years ago but has some improvements. And, if you’d prefer restorations of old displays rather than modern incarnations, we have you covered there as well.

Thanks to [Bob] for the tip!

Modular synthesizers are some of the ultimate creative tools for the electronic musician. By experimenting with patch leads, knobs and switches, all manner of rhythmic madness can be conjured out of the æther. While they may overflow with creative potential, modular synths tend to fall down in portability. Typically built into studio racks and composed of many disparate modules, it’s not the sort of thing you can just take down the skate park for a jam session. If only there was a solution – enter the madness that is Synth Bike.

Synth Bike, here seen in the 2.0 revision, impresses from the get go, being built upon a sturdy Raleigh Chopper chassis. The way we see it, if you’re going to build a synth into a bicycle, why not do it with some style? From there, the build ratchets up in intensity. There’s a series of sequencer modules, most of which run individual Arduino Nanos. These get their clock from either a master source, an external jack, or from a magnetic sensor which picks up the rotation of the front wheel. Your pace dictates the tempo, so you’ll want to work those calves for extended raves at the park.

The features don’t stop there – there are drums courtesy of a SparkFun WAV Trigger, an arcade button keyboard, and a filter board running the venerable PT2399 digital delay chip. It’s all assembled on a series of panels with wires going everywhere, just like a true modular should be.

The best thing is, despite the perplexing controls and arcane interface, it actually puts out some hot tunes. It’s  not the first modular we’ve seen around these parts, either.

Ever since Jimi Hendrix brought guitar distortion to the forefront of rock and roll, pedals to control the distortion have been a standard piece of equipment for almost every guitarist. Now, there are individual analog pedals for each effect or even digital pedals that have banks of effects programmed in. Distortion is just one of many effects, and if you’ve built your own set of pedals for each of these, you might end up with something like [Brian]: a modular guitar pedal rack.

Taking inspiration from modular synthesizers, [Brian] built a rack out of wood to house the pedal modules. The rack uses 16U rack rails as a standard, with 3U Eurorack brackets. It looks like there’s space for 16 custom-built effects pedals to fit into the rack, and [Brian] can switch them out at will with a foot switch. Everything is tied together with MIDI and is programmed in Helix. The end result looks very polished, and helped [Brian] eliminate his rat’s nest of cables that was lying around before he built his effects rack.

MIDI is an extremely useful protocol for musicians and, despite being around since the ’80s, doesn’t show any signs of slowing down. If you want to get into it yourself, there are all kinds of ways that you can explore the studio space, even if you play an instrument that doesn’t typically use MIDI.

In Insert Coin, we look at an exciting new tech project that requires funding before it can hit production. If you'd like to pitch a project, please send us a tip with "Insert Coin" as the subject line.

Everybody loves robots, but the initial ardor for building one can quickly be snuffed out by the complex reality of actually programming it to do anything. That's where Linkbot comes in, a new project from the Barobo team that brought us the Mobot. It's designed as a modular system that can be expanded infinitely with accessories like a camera mount, gripper, and wheels, thanks to three separate mounting surfaces -- which also have standard #6-32 screw attachment holes on the mounting plate to attach personality-enhancing cutouts. Despite the expansion potential, though, it can still be used right out of the box to do robotics without touching a lick of code. That's thanks to several built-in modes like BumpConnect, which permits wireless connections between the modules by touching them together; and PoseTeach, to program complex motions by hand in a similar (but less time-consuming) manner to stop-motion animation techniques.

For those who want to step it up a notch, the system lets you go far past basic mech fun. The Linkbot itself has two rotating hubs with absolute encoding, along with an accelerometer, buzzer, multicolored LCD and ZigBee wireless system with a 100m line-of-sight range. There are also optional breakout and Bluetooth boards to connect sensors like range finders, IR proximity sensors, photo detectors and thermostats. The outfit's BaroboLink software for Mac, PC or Linux is included to program the Arduino-compatible bot in several languages as well, and can even translate previously created PoseTeach motions into computer routines. So far, the company has created working prototypes and even shipped them to local schools, so if you're interested, you can pledge a minimum $129 toward the company's $40,000 target to grab one. That'll net you a Linkbot, two wheels, the BaroboLink software, access to the MyBarobo community -- and hopefully a jolt to your robotics confidence.

Filed under: Robots

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Source: Kickstarter

In Insert Coin, we look at an exciting new tech project that requires funding before it can hit production. If you'd like to pitch a project, please send us a tip with "Insert Coin" as the subject line.

Fallen out of love with sensor? Don't worry, Variable Technologies is here to help. The company's working to bring the world Node, a project aimed at helping smartphone users "explore the fun and power of sensors." The "Swiss Army knife-sized" modular device communicates with the iPhone 4S and Android devices via Bluetooth. It has a built-in accelerometer, magnetometer and gyroscope and can detect physical motion and space, temperature and elevation, to name but a few. It also has a game control module and eight LEDs that can double as a camera flash, with carbon monoxide and radiation detection on the way. The Node will be compatible with Arduino devices and will have an open API, firmware and source code. There's a month left to help Variable hit its lofty $50,000 goal. Click the source link for more info.

Continue reading Insert Coin: Node helps your smartphone monitor pretty much everything

Insert Coin: Node helps your smartphone monitor pretty much everything originally appeared on Engadget on Thu, 23 Feb 2012 16:49:00 EST. Please see our terms for use of feeds.

Continue reading Insert Coin: BoardX is an open-source, modular motherboard for prolific prototypers

Insert Coin: BoardX is an open-source, modular motherboard for prolific prototypers originally appeared on Engadget on Tue, 01 Nov 2011 13:15:00 EST. Please see our terms for use of feeds.