Minimal OmpThe video op-amp AD8072 from analog is a nice chip which as great potention to build simple, quick video distrotion tool. I build another Vogel video version because I so much like the design of todays circuits. Nowadays pcb's are so complex its unhuman and intimidated. Makes you feel stupid because you don't understand it. I like the fact that you could follow the lines and think you understand the circuit. Anyways, looks cool to me. Totally unpractical video amp with controler. Here's a movie
Midi-Controller: MoxygenModified midi controller build from a very well used oxygen 8 from midiman (m-audio). The original controllers are solide but I didn't like the keyboard. I always mixed up the functions and put stickers on the keys, eventually it isn't natural. With the 8 potentiometers and three other variable controllers on a single usb, I really like this device for vj-ing and other live manipulation stuff. The keys had to go, so I build it into a enclosure. All the rectangle cuts are hell to perfect but looking good afterwards.
RF-modulatorNo cost RF-video modulator! You want your video on antenne? get yourself an old vcr, rip out the silver antenne box inside and hook it up with 5 volt and some video /audio. There's a nice page that explains the proces pretty well. This is a nice way to put video on an old tv that doesn't have a scart or video input, but more important to me is to re-use old electronica..The pins of these small sliver boxes that do the video to antenne conversions have always a video in / audio in/ ground / +5 volt input. I took a universal adapter where you can select the voltage output. These adapters are stabilized so 5 volt means 5 volt, not more.
Video GeneratorI needed a constant PAL video signal for feeding video mixers. Most mixer need a video signal to work. With the help of Lourens I write a code in assembler that simulates video on a mega8. For this app I mostly had all the info from Rickard Gunee, how is one of the masters in generating video from a micro controller.
In this version I have a ATmega16 running on his internal crystal at 8 mhz. That was nessesary to make a full white or black frame. The timing is very critical and still is not correct. I tried this version directly on a video projector but didn't work. Only on the JVC mixers its working fine. With this device I can produce a black or white video signal.
Minimal Video MixerI wanted a small video mixer that mix two video sources. I found the Gennum gt4122 with a great pdf that has three test versions ready to build, all from the video hardware pages of audiovisualizers.com. This chip can mix two composite sources without sync with a thrird as reference. To bad you still need to strip the sync, generate a sync and mix them. With the video input you can mix the two sources!!! Black video (0,3 volt) is channel a and white video (1,0 volt) is channel b.
My first intentions with this chip (ordered free sample on there site) was to make a really portable video mixer. One in a small box with only one fader and two video connectors. The artwork for the smd-chip was ready to go but I got inspired by the work of Peter Vogel. I thought I could make a small video-version.
Sync CorrectorDigital video carriers or converters that try to visualize analog video interference have often difficulties to make a representation of the f*ck up signal. Incorrect sync information is often the reason why a beamer go on a blue screen. Telling me that there is "no signal", what da ..... there is, but the manufacters of the devices say it isn't video. Digital video carriers have to converter the analog video signal into his digital representation. In order to show my interference I needed a sync corrector to feed a signal that is convertable for this kind of devices. It takes the sync information from the normal (correct) video input and mix it with the noisy video. I have to admit that it wasn't working that well. I brought a real time base corrector to deal with this problem but it gives the aesthetics of a well working machine. The manufacters telling us what video is can't feel right. Still working on this!
USB Controller I needed a cheap usb controller with two variable controllers. I found a cheap game pad for 10 euro that works under max/msp on the mac. It probably will work under windows. The game pad joysticks are potentiometers that can be replaced by normal, big pots. I used 4.7 k ohm potentiometers but often these controllers use 10k ohm potmeters. I changed it because the two joysticks in the game pad are centered by a spring so they shoot back to the centered value. There are still knobs left to use, but this was good for my soft.
Bas van Koolwijk and Gert Jan Prins' project Synchronator for Impakt. A very interesting project where the two made a piece of hardware for understanding audio as video signal. They made two tools that can convert audio as rgb signal without touching the sync, so they can project video disruption without projector that constantly flips on "no-signal".
The workshop was a part of the project. They ask me to present some video circuit bending tricks. We bent some video mixers, radio's, game pads, did some max-programming and build logic audio circuits. Photo's by Beeld.nu
Fun and frustration from the video printer, found for € 7,50 on marktplaats.nl. Glitch Printing with a secondhand Sony CVP-M1E PAL Printer and glossy paper.
Audio Office, 05-11-2005, Groningen. A open dvd-player and open lcd-screen on the wall.
Software & Interface: joyNoise 0.0.4
software with interface. not finished. Original idea was to convert the joystick to atmel and use it for joyNoise. A rewrite soft found on the max-list that generates tv-noise aesthetics. I made it variable so I could play it with a joystick. This huge joystick had enough buttons to control the noise...