Fabricating A Music-controlled Stoplight

December 31, 2010 by Mike Szczys 16 Comments

[Andrew] built himself a stoplight that flashes along with the music. Unlike the traffic signal we checked in on a year ago, this one’s not a reused municipal fixture. [Andrew] imported a 3D model into Sketchup, printed out the results, and traced them onto Bristol board to make his templates. He cut out the parts, used a brake for the bending, then a combination of spot and MIG welding to complete the housing. Off to his school’s spray booth for priming, baking, and painting for a perfect finish.

The internals are what you’d expect. Each light source is made up of a cluster of LEDs controlled by an Arduino. Music synchronization is handled by a Processing script that [Andrew] wrote, which you can see in action after the break.

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Tape Delay Made From Recycled Cassette Decks

December 20, 2010 by Joseph Thibodeau 25 Comments

Professional tape delay units are great fun, but often expensive. You’d think that with so many derelict cassette decks filling the world’s dumpsters someone must have figured out a way to make a cheap tape delay… not only in the interest of saving money (sometimes quality is worth paying for) but also in the interest of re-using otherwise wasted resources.

Forosdeelectronica forum user [Dano] has made just such a device from used cassette decks and miscellaneous parts (translated). First he investigated the operation of the playback, erase, and record mechanisms and broke out the tape heads. The playback head is on a plastic rail so that the delay time can be changed, while the record head is fixed. [Dano] encountered some difficulties in ensuring good quality for the recording and erasure, which is an important consideration when working with magnetic tape.

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If You’re Photographing And You Know It Clap Your Hands

December 18, 2010 by Joseph Thibodeau 9 Comments

If you’ve ever tried to take pictures of yourself you’ll know that it can be a pain. It’s especially hard to get that perfect shot of your godly features when you’re out of breath from sprinting across the room. OK, yes, they have remote controls for that. But what if you lost your remote or you just don’t want to have to carry it? [LucidScience] put together a sweet, um, “hands free” alternative.

Essentially this hack emulates the IR signals sent by a Nikon remote, either to take a picture right away or to take time lapse photographs at regular intervals. We’ve seen a similar time lapse remote using an arduino before and a really thorough one using an AVR, but they don’t take the same approach as [LucidScience]’s design in terms of monitoring a microphone input for triggering. The project includes several status LEDs and adjustments for ambient noise and triggering, and it can be mounted to the camera body. We wonder how many of the Nikon’s features could be controlled using clap encoding, and how detailed your timing would need to be to have a kind of hand-made (get it?) pulsetrain syntax. You’d probably need to have world record clap skills.

Check out the demo vid after the break.

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Rich Decibel’s Kequencer

December 17, 2010 by Joseph Thibodeau 14 Comments

It’s totally excellent when a simple concept results in something inspiring and fun. [Rich Decibel]’s Kequencer is a good example, starting off as many projects do: “I had an idea the other day and I couldn’t decide if it was good or not so I just built it to find out.” Be still our hackable hearts!

[Rich] built this sleek little sequencer from scratch and while the design may not seem very novel to begin with–eight square wave oscillators with on/off switches and pitch knobs, played in sequence–but the beauty of it is in the nuances of interaction and the potential for further hacking. From watching the video you can see how the controls can be used in very interesting ways to create and mutate adorable chippy tone patterns. Check it out after the crossfade.

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MP3 Player Barely Larger Than An SD Card

December 13, 2010 by Mike Szczys 45 Comments

If your board fabrication and soldering skills are up to it, you can make your own tiny MP3 player. This rendition is just about half again as large as a standard SD card, whose slot is on the bottom of the board seen above. The heavy lifting is taken care of by a VS1011 MP3 decoder which also has its own stereo headphone driver on-chip. There’s no display and it seems that most of the 4k of program memory on the PIC 18LF88 is being used. Too bad, we’d love to take this to the next level, attaching it to the head unit in a car and spoofing the communications as if this were a CD changer.

[via Hacked Gadgets]

Vintage Car Audio Gets MP3 Input

December 8, 2010 by Mike Szczys 20 Comments

[Nali] is fixing up a 1966 Rambler Ambassador and decided to give the audio a bit of an upgrade. Instead of replacing the head unit he added a connector for audio input. The method he used is simple, inexpensive, and allows the original unit to continue functioning as a radio. He cut the feed wires going to the volume knob and patched in a headphone jack. The jack he used has an internal switch that is meant to switch off a pair of speakers when headphones are plugged in. The jack will allow the original signal from the radio tuner to pass through whenever there isn’t a connector plugged in. It seems like this is easier on older hardware than it is on modern equipment.

This isn’t where his entertainment enhancements stop. [Nali’s] working on a 7″ in-dash Linux machine so keep your eye on his thread to see what he comes up with.

[Thanks Joel383]

Steam-powered Rickrolling

December 2, 2010 by Mike Szczys 28 Comments

This is a steam-powered record player; awesome. But wait, that’s not all. Watch the video after the break for about two and a half minutes and you’ll realize that it’s also a Rickroll. No, you’re not getting baited into clicking through to Rick Astley’s music video, the LP that’s playing on the turntable is a copy of “Never Gonna Give You Up”; all kinds of awesome.

This all started with a steam engine machined from a stainless steel bolt and a brass cylinder. It was tested using compressed air before building the boiler. But what’s a steam engine without a purpose? The problem with using a steam engine as a turntable motor is speed control. This is where we move to modern technology, using an Arduino to measure the RPM and adjust the steam engine using a servo motor.

The builder makes a comment that this sounds terrible, but considering it’s steam-powered we think it sounds just fine.

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