[Viktor] dredged up a hack he pulled off years ago. His grandfather likes to end the day in front of the TV, but he falls asleep soon after sitting down. Rather than tick away the electricity meter all night, [Viktor] built an automatic shutoff which is akin to a modern TV’s sleep feature.
At the time microcontrollers were not as easy to source as they are now. So [Viktor] used a circuit based on the 7400 family of logic chips. It uses a multivibrator to feed some binary counter chips. These are used to divide the oscillations to establish the desired timing. He tuned the system to be about 15 minutes, but that can be adjusted using a potentiometer built into the multivibrator. When time is about the run out an LED next to the TV comes on. This way if [Viktor’s] grandfather is still awake he can press a button next to his chair to reset the counter. But if he’s already snoozing the counter will eventually switch off the television.
Ah, the days when a television was a solid piece of furniture. When it comes to moving, we can’t say we miss it. But looking at this wooden TV cabinet with storage for its 7-function remote we can’t help but think that today’s TVs seem more… trivial… when it comes to the layout of the living room.
The promotional video that goes with this model is a gem of a different era. As you probably have heard, this week [Eugene Polley] passed away. He is credited with inventing the first wireless television remote control. It was not nearly as advance as what’s shown in the video after the break. Instead, it used visible light in conjunction with four light sensors at each corner of the CRT screen. You could turn the set on and off, and flip through channels, but sometimes with the right lighting conditions the set would change all by itself. We wonder if you’d ever come home to find the TV has mysteriously flipped itself on?
Continue reading “Retrotechtacular: 7-function remote control color television”
Here’s two builds that print text to a TV with only two pins:
Still Alive with an Arduino
After seeing all the builds that play Still Alive, [Bob] decided to take a 1972 amber monitor and recreate the cut scene at the end of Portal. The build uses the TVout library for Arduino. There were a few problems with running the Unix and Still Alive animations at the same time, so [Bob] flips a bit in the EEPROM at the end of the command line animation and restarts into GLaDOS’ report. You can check out the old school color monitor here
ATMega Video Text Generator
[Stian] didn’t think his build was good enough for Hackaday, but his friend [Mikael] thought otherwise. [Stian] wrote a library to generate an NTSC video signal in real time. It’s a text-based build with 37×17 character resolution and only requires about 3kB of RAM. As a bonus, it only takes up two pins on [Stian]’s ATMega128.
You can check out the videos for both these builds after the break.
Continue reading “Controlling a TV with a microcontroller”
While CRT televisions fall to the wayside as more people adopt flat-panel TVs, the abundance of unused sets gives hacker/artist [Kyle Evans] an unlimited number of analog canvases on which to project his vision. He recently wrote in to share his latest creation which he dubs “de/Rastra”.
The “CRT Performance Interface” as he calls it, is an old analog television which he hacked to display signals created by moving the TV around. Fitted with an array of force sensors, accelerometers, and switches, the display is dynamically generated by the movements of whomever happens to be holding the set.
Signals are sent wirelessly from his sensor array to an Atmel 328 microcontroller with the help of a pair of XBee radios, where they are analyzed and used to generate a series of audio streams. The signals are fed into a 400W amplifier before being inserted into the CRT’s yoke, and subsequently displayed on the screen.
We’re sure [Kyle] is probably trying to express a complex metaphor about man’s futile attempts to impose his control over technology with his project, but we think it simply looks cool.
Check out [Kyle’s] work for yourself in the video below and give us your take in the comments.
Continue reading “You’ll throw your back out playing this analog TV synth”
If the addition of Siri to your iPhone has given you a somewhat-real life companion (and hope that you might not be forever alone) this hack is right up your alley. [Todd Treece] built a hardware fixiture for the living room which bridges the gap between Apple’s new digital assitant and your television.
The box itself is an Arduino with a WiFly shield and the hardware necessary to make it a universal infrared remote control. He mounted it on the underside of his end table, with the IR LED in line-of-sight for the television. Using SiriProxy he’s added functionality that lets you request a channel change either by the name of the network, or the channel number.
As you can see in the video after the break, Siri has some strong opinions on the quality of programming for certain channels. That and contempt for your inability to just change the channel yourself. But this setup does augment your remote control experience by giving you a synopsis of what’s playing right now for the channel you’ve requested.
Continue reading “Siri as a lippy and sometimes profane television remote”
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.
Continue reading “Synthesizing sound with a light sensitive pen and CRT television”
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.
Continue reading “CRT art: Wobbulator”