Synthesizing Sound With A Light Sensitive Pen And CRT Television

October 29, 2011 by Mike Szczys 7 Comments

Here’s the latest project from [Niklas Roy’s] workshop. Lumenoise is an audio synthesizer controlled by drawing with a light-sensitive pen on a CRT television.

The pen is a self-contained module which connects to the TV via audio and composite video RCA plugs. Inside the clear pen housing you’ll find a microcontroller which generates the audio and video. The business end of the pen contains a phototransistor which lets the ATmega8 take a reading from the video screen. Since the chip is generating that video signal, it’s possible to calculate the pen tip’s position on the screen and modulate the sound output based on that data. You can watch a recording of the results in the video after the break.

This is a very simple circuit to build, and [Niklas] makes the point that most of us have a CRT hanging around in a dark corner somewhere. We think this would be a fantastic soldering project to do with the kids, and that this would be right at home as a children’s museum piece because of the wow factor involved in playing around with it.

We can really tell from this and some of his past projects that [Niklas] just loves the 8-bit audio.

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CRT Art: Wobbulator

November 17, 2010 by Mike Szczys 24 Comments

The Wobbulator is a black and white CRT television that has additional hardware to manipulate the electrons as they bombard the phosphor layer of the screen. It was created by [June Paik] and you can find it at The Experimental Television Center. [Blair Neal] took some time to share the background information and some video on this interesting device.

The television has a second ”yoke” of coils around the ray tube. The TV still functions normally with these coils installed, but running a signal through them can further manipulate the picture. Hook, them up to a function generator and you can get some pretty wild effects. In this case, the signals from a sound generator are controlling the coils, resulting in the audio/video artwork which you can view after the break.

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Hacking TVs In 1954

October 19, 2010 by Caleb Kraft 32 Comments

shaddap already!

This gem was published in Mechanix Illustrated magazine in may of 1954. AT that time, a remote control was the stuff of science fiction. This article shows the modern man how to modify his television to include a fancy button to stop all noise. This button, affectionately labelled the “SHADDAP” was marketed as a way to relieve the pain of long winded commercials. Basically, it cut the connection to the speaker, nothing super fancy. Is that an altoids tin as an enclosure?

[via BoingBoing]

Paging System For Your TV Remote

October 13, 2010 by Mike Szczys 16 Comments

[Matt] brought together a TV remote and cordless phone to add a locator system to the remote control. One of the best features of a cordless phone is the pager button on the base. When you press it the handset beeps until found. Matt gutted one and got rid of the unnecessary parts. He then cracked open his TV remote housing and inserted the telephone handset’s circuit board, speaker, and battery. The base station is used just like normal to locate the phone/remote combo, and has been modified with a charging cable to top-off the telephone battery which powers everything in the newly hacked unit. [Matt’s] demonstration video is embedded after the break.

It’s too bad that he got rid of the microphone. It would be interesting to take calls on this thing.

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Adding SCART To A Cheap CRT Television

May 27, 2010 by Mike Szczys 46 Comments

[133MHz] cracked open a cheap tube television to add a SCART connector. He knew he had a chance at success when he discovered all of the knock-outs on the back of the connector panel because one of them was exactly the right size for the connector. But it wasn’t quite as easy as soldering in one component. He ended up injecting his own RGB data from the SCART connector directly into the onscreen display, making an end run around the missing feature. [133MHz] removed some resistors in the circuit and used the empty lead holes to patch in his own circuit, feeding the RGB data from the SCART connector to the OSD chip in the format it needed.

This one takes you way down the rabbit hole. We’re glad he provided so much background about the hack but it’s going to take us a little while to fully wrap our heads around how he figured it out.

[Thanks Victor]

Mechanical Scanning Television

April 13, 2010 by Mike Szczys 35 Comments

This project explores the early days of television. Above you see a view from the back side of a mechanically scanning television. The black disk spins and the holes, aligned in a spiral pattern, create vertical scan lines for projected light to shine through. In this case, [Eckhard Etzold] is using red, green, and blue LEDs to create a color picture. As you can seen in the video after the break it does a pretty good job. The main problem being that the scanning disc on a mechanical TV has to be much larger than the actual image. How big would the disk need to be and how fast would it spin to produce a forty inch image? We still think this is a better method than transmitting video data in parallel.

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Hulu Desktop For Linux . . . Finally

October 9, 2009 by Brett Haddock 28 Comments

hulu

The folks over at Hulu Labs have been busy it seems, as they have just released a version of their desktop client for Linux. Windows and OSX versions of the desktop client have been out for some time now, but Linux has been left in the dark. Functionality wise, it operates and plays videos identically to its counterparts. The Linux version can also be controlled via an IR remote. We certainly are excited to add this to our entertainment systems. The release is a bit of a surprise, but a welcome change to the usual treatment of Linux, and it’s nice to see the mainstream start to recognize it. Plus, this is just more ammunition for getting rid of those monthly cable/satellite subscriptions.