Everyone has seen Raspberry Pi Computer, the credit card sized mini PC circuit board that cost only $35. Now there is a new Mobile Raspberry Pi called Pi-to-Go. Mini LCD, 10 hour battery, and 64GB SSD hard drive. You can 3D print your own case and build your own. Complete instruction on how to build this Pi-to-go computer can be found here: blog.parts-people.com/2012/12/20/mobile-raspberry-pi-computer-build-your-own-portable-rpi-to-go/
Video of it in action
youtube.com/watch?v=E89s2h9swIc

this is version one of my beatjazz gestural control interface. it is a 3 way wirelessly networked control interface for creating and manipulating sound. there is a headset, and two hand units, all adjustable.

the beatjazz control interface is not an "instrument" as much as it is an idea of personal interfacing. i created this as my interface to computers to express myself in a different way, owing to the neccesity to program everything myself. my personal version has not remained design stable since its first functional iteration. it is evolving along with the software and the biokinetic paradigm.

in this version, the headset has a pressure sensor that registers breath pressure and uses it to instantiate notes, and functions. it also has a lip sensor made from a force sensing resistor that allows for lip control in a manner similar to a sax player but with massively more potential for expression.

the hand units are exactly the same except that they are mirrored (i designed the left hand and inverted the design before printing.) there are four fsr mounting points on the keypad area for force sensing resistors. underneath the forefinger and the thumb on each hand, there are 5 way toggle switches that i use for mode selection (volume control, looper rec/dub, sustain and primary loop record) and the lower one is for octave selection. on the right hand the upper joytoggle is for transposition modes and for some upcoming concepts i am playing with ;-) while the lower joytoggle is for pre and post fx, muting and feedback.

an accelerometer on each hand determines x-y coordinate based on the plane positioning of the keypad of each hand. with the keypad level with the ground, x axis is left/right tilt and y axis is forward backward tilt, both from the wrist. these motions are used to control a grid of gestural parameters. the synths that i use are purpose built for this method of control, which i call gestural trajectory synthesis. (i will be uploading the patches very ooon.)

This is a Thing I have Built a Prusa Mendel with 1.8 Steppers and a RAMPS 1.4 SHield for an Arduino Mega.

This is the TinyFan a fan (and fun) driver that controls up to 4 12V fans using just an ATTiny45 or ATTiny8, 4 tactile switches and some electronic components (most general use, aka cheap).

The programming of the ATTiny has the folowing capabilities:
+ Can use PWM in 2 of the outputs (labeled 1 and 2)
+ The tactlie switches have a secondary (special) function if held during 2 seconds.
+ The program can use EEPROM memory to save last state in the chip. Also, if you don't want this feature, you can disable it.

Also you have available two designs: Prefboard or PCB.

Watch it in action! goo.gl/UIM2Z (G+ album)

This thing was made by:
Francisco Malpartida
G.W.C.

Special thanks to Iceflow.

Update 15 Aug 2012 (00:00)
Improved the programming. Now memory is only rewrited after a state sticks for 2 seconds (saving writes while changing the PWM state), and also the code has been reduced (1.96KB without EEPROM, 2.27KB with EEPROM).

This is the PRotos 3D-Printer designed on the base of Mendel/Prusa to build up a more versatile printer wich is expandable for different applications.
It is available as a complete kit at: grrf.de/de/catalog/grrf-protos-3d-drucker-komplettbausatz

This is a derivative of Tinkering's thingiverse.com/thing:4526 with the endstop interface and the LED's removed (for now) using the robotshop.com/pololu-8v-35v-2a-single-bipolar-stepper-motor-driver-w-regulators.html . This board is designed to be easy to etch at home using the laser printer method so it can be made at home. I decided to make this guy because i fried one of my motor controllers by accident and the replacements have a 3 week lead time. Everything needed to make this can be picked up from radio shack in exception to some of the connectors.

If you want micro-stepping (1/16), and want to learn how to make your own PCB, this thing is for you.

* Will be finishing write up soon!

Addition of lights to my stage.

This is a base for a bicycle light

The human powered internet cafe looks at the issues of renewable power generation and aims to educate users to the energy requirements of surfing the internet.

Users are asked to peddle the exercise bikes in order to turn a dynamo which would in turn power the computers. If users fail to peddle hard enough the computer monitors will begin to flicker encouraging them to peddle harder.

The thing would ideally be placed in public areas where all forms of society could view it and try it out for them selves, thus educating as many people as possible.

Buttons
the 8 buttons per Arduinio gave us plenty of digital input pins. we no longer needed shift registers, and could use a simplified button circuit:
arduino.cc/en/Tutorial/Button

RGB LEDs
the lighting control came after much experimentation with very bright RGB LEDs. These were broken out to their own board with independent power supply. the Arduino could not drive the high powered LEDs and placement needed to be more flexible. The Arduino controls the RGB values via three PWM pins and a common ground. The values are reversed due to the odd relays we acquired. (ie {R=256,G=256,B=0} is BLUE)


Midi-out
midioutThe midi-out circuit is very straight forward with only two connected pins and a dangling ground. These wires are thin and continually come loose and cause trouble.




PCB
Fritzing.org has wonderful layout software that was used to generate the green image above. Soon they'll support eagle export, which will open up the design to any board shop. André Knörig has been an amazing resource by helping with the PCB routing and our submission into the Fritzmas contest.

This is the Sanguino board. It is an Arduino compatible board based on the atmega644P. This page will tell you how to assemble one, probably from a kit that you bought somewhere. Once you are done, you'll have a sweet little board you can use for prototyping, hacking, or even for a permanent project.

The Sanguino has some awesome features like:

* 64K of flash space
* 4K of RAM
* 2K of EEPROM
* 2 hardware serial ports
* 32 GPIO pins
* 6 PWM pins
* 8 analog pins
* I2C, SPI, etc.