For the interactive drum robot installation “MR-808 Interactive” we need interfaces that control this art installation. We choose Nexus 7 2013 (second version) Tablets as they are cheap (ca. 120€ at Ebay) and easy to use. On them we open a web-based drum sequencer that controls the physical moves of the robot in realtime. (more…)
The mask for PCB creation with photo positive methode is usually printed on a foil, exposed and developed on the laminate with a UV lamp.
Here we describe how to laminate two cheap layout masks together so the development with UV light will be better. http://fritzing.org/learning/tutorials/pcb-production-tutorials/diy-pcb-etching/
The TLC 5940 is an awesome stand-alone 16 channel PWM chip, which can control e.g. 16 LEDs and is programmable via the SPI Bus. There is plenty of good code for connecting this LED Driver chip to the arduino.
I had the problem that I wanted to connect a 3W white LED and thus needing a high-current output for the TLC 5940. The TLC can drive 130mA per channel. The 3W LED has 0.25A @ 12V. I blogged about this before and there are different approaches:
- Connecting more than one outputs in parallel to the high power LED as proposed by TI in this PDF. One output can drive 130mA and so you can add them up.
- Connecting a N-Channel Mosfet (BUZ 11 (old!), IRLZ34N, NDS355) directly and using a pull-up resistor. The TLC is a current sink, meaning that its driving the load (e.g. LED) always to ground. Its working, but you have to invert the PWM in software (Full PWM = No Mosfet Output und visa verse).
One Version which I want to present here is to add an additional transistor like the BC547 to invert the TLC PWM signal and make it useful for driving the MOSFET directly!.
In the circuit you see the TLC on the left side and some more low power LEDs. Then you have the MOSFET circuit on the right. The high Power LED (not in the diagram) is connected to VCC (+12V) and the MOSFET drives it to ground when switched on.
Lets go! When the TLC channel is off, the Transistor – a SMD variant of the famous BC547 – is switched through, pulling the Mosfet to ground: the LED is off.
If the TLC now starts working it pulls the Transistor to ground, leaving a positive potential at the ate of the Mosfet, which results in a lightening LED.
Sometimes it is not possible to stuff all the hardware for a live performance into a Macbook. Then you need a real PC. But it shall be transportable. Without too many cables. Easy to setup. With everything insode .. well, like a macbook.
For our glitch robot project we needed a PC to handle the video date. And so we build our OWN laptop!
I recently made an redesign of some parts of our Glitch Robot Installation. A wonderful example of the capabilities of 3D-printing which we are using so often. Designed one year ago, I just had to press “print” to reprint the broken parts.
‘Madcam‘ is an open frameworks (C++) based project for mixing USB Web Cameras (e.g. the 10$ cheap PS3-Eye web cam) im realtime. Why this is awesome? Its usually hard and/or expensive to mix many video signals in realtime and display them side by side. We found a way to make it cheap, quick and reliable!
The project is a visual extension for another awesome project called “Glitchrobot” where Robots are used to make electronic music, but thats another issue. Lets start!
The goal is set up an VJ setup which is based on live webcam material. One webcam? – Boring! 10 Webcams? – “Unlimited” fun! (more…)
Only do this modifications if you know what you are doing. I will not be responsible
for damage done to you, your device or the people around you.
For an installation called Boom Boom Station, we chose several cheap and easy to play instruments like the Korg Monotron, a delay line from behringer and a stylophone. To save money and battery-induced environment pollution we opened the Korg and the Stylophone to add extern power, so that they can constantly driven with a standard power plug.
The music robot “Glitch Robot” aims to produce sounds used in electronic music. It is referencing to glitch sounds – or Clicks ‘n Cuts – a sub genre of the electronic music.
I started with the imagination of what sounds I would like to use when producing music. What percussion sounds does a music track need? Escpecially if you’re into glitchy sound of the infamous clicks n’ cuts era. If you don’t do minimal techno, you need more than a phat bass drum & Hihat. (more…)
A simple sketch for sending MIDI Data from 5 potentiometers (only 3 in the pic above) connected to the AnalogIns from an Arduino (A0, A1, A2, A3, A4) as CC Values.
The sketch is based on the newest MIDI Library from fortyseveneffects, which has to be installed.
Two left hands and no passion nor time for learning piano or guitar? Try out this super simple Arduino Midi-Theremin! This simple Midi Theremin uses a HC-SR04 Ultrasonic Sensor (which is extremly cheap ~2-4€) and produces a MIDI-out signal, analog to the measured distance from an object. Apart from the Senor you only need an Arduino (in this case an Arduino Nano), some wire and some MIDI playing device.
Find the – still alpha – sourcecode here