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Revision as of 22:33, 20 June 2015
http://hackteria.org/wiki/QTouchADC_Library_for_Arduino
Contents
Board Design
On GitHub
Make Your Own CocoMake7
Programming the Attiny84 from the Arduino as ISP
Similar to our prototypes it's very easy to just make one on a protoboard. You need to first program the Attiny84 using ISP-programming.
At the moment we are still using an FTDI or other USB-2-Serial converter to connect it to a laptop. V-USB is coming soon..
ISP Programmable CocoMake7 on protoboard
Only a small number of parts are needed
Solder a IC socket, 14pin for the Attiny84 and a pin-header 6pin for the ISP connection.
Solder the wires from the ISP connection to the chip, diagram will follow...
Almost complete. Added USB plug and the Vcc and GND to it. A 3.5mm mini-jack after the LED
Add components
Cut the board into shape and put it into a coconut
Done:
- add LED with resistor on pin 5, aka PB2, formely known as pin 8 in the Arduino IDE
- solder the USB port, still need to figure out the pin layout...
Nest steps:
- connect the USB port D+ and D- to pin 2 and 3, aka PB0 and PB1.
- Figure out the V-USB stuff... stahl is working on it!
Other Prototypes of the CocoMake7
CocoMake7-Hackathon
June 20 & 21 we are doing the CocoMake7-Hackathon in Zug... let's see what nice educational and sound/performative elements we can develop!
Comparison to Makey Makey
Resistive sensing vs. capacitive sensing
NO NEED FOR SECOND ALLIGATOR-CABLE!
VS. 
These schematics compare the resistive sensing from makey makey to the CapSense library (needs a high Ohm resistor, on the digital pins). There is a huge difference in the interactivity if the "user" doesn't need to be hooked up to a wire. everybody can interact, multiple people can play at the same time etc..
By using the QTouch ADC method, the analog pins of the microcontroller can be turned into capacitive sensor, without the need of any external circuitry.
Low-Cost
The Makey Makey kit incldudes, the board, some alligator clips, USB cable and a booklet, cost 49$, or 3'500 IDR. Far too much for many schools in india or worldwide.
We are aiming at Bill of Materials prize of approx 3$ for small scale production (5-25pieces). can be reduced to 1.6 - 2$ for large production series (1000 pieces).
Just a general thought about different interpretations of "low-cost" in the West... in China... and in India?
Makey Makey GO
just now, May 2015, they announced a new product, already heavily hyped online and fastly supported on their kickstarter campaign (please not the address -> Cocoa Beach :-)
This one seems to use CapSense, maybe on an attiny? no open hardware as it seems...
- 1 single Capacitive butten
- detected as keyboard, spacebar press it seems
- magnetic to clip on aligators, or put it on the fridge
- nice and small
- 19$, prize is soso... for only 1 button
- attached to smart phone via the usb-converter plug
Jugaad
We make it as cheap as possible, including capability for local manufacturing. DIL-package, easy available parts, 1 sided PCB design and protoboard design, fancy PCB for collectors and geeks.
Which AVR microcontroller to use?
ATTINY 84
- availability ok, prize starting around 150 IDR (2$), 1.50$ from Mouser, goes to 0.83$ if you buy 1000.
- 8 ADC channels
What's the difference beetween attiny84A and attiny84 or Attiny84V (Low Power and expensive?) or Attiny841 (new edition of attiny84 or attiny84A)?
ATTINY 25/45/85
- availability ok, prize starting around 85 IDR (1.20$)
- only 4 ADC channels
ATMEGA 328P
- very widely available, prize starting around 220 - 250 IDR (3$), 3.48$ from Mouser goes to 1.82$ if you buy 1000.
- The smd chip has 8 ADC channels, but the DIL seems to only have 6 ADC channel on Port C, ADC0 - ADC5
- other extra pins for doing stuff
Download ATMEGA328 datasheet
ATMEGA 32u4, same as leonardo or the makey makye
- only smd package
- High prize, 6.32$ from Mouser
- Hardware USB support!
Design Concept
Download pdf: File:CocoMake7_concept_Diagram.pdf
Working prototypes
Attiny84 4 Channel QTouch -> PWM and serial out
Controlling a synth on puredata
Triggering samples on puredata
Attiny84 I2C communication to Mozzi Sound processor
Related Projects
HID Keyboard emulation
V-USB virtual USB emulation on ATMEGA
V-USB HID devices on attiny, loads of well written code
Gnusbuino by Michi Egger - anyma
Easy Logger V-USB keyboard on Attiny
- http://www.obdev.at/products/vusb/easylogger.html
- http://codeandlife.com/2012/02/22/v-usb-with-attiny45-attiny85-without-a-crystal/
Virtual Keyboard (vusb-for-arduino library) for Arduino
- http://www.practicalarduino.com/projects/virtual-usb-keyboard
- https://code.google.com/p/vusb-for-arduino/
- http://www.hackster.io/rayburne/arduino-to-excel-using-v-usb
- http://blog.petrockblock.com/2012/05/19/usb-keyboard-with-arduino-and-v-usb-library-an-example/
Trinket Pro, ATMEGA 328 with bootloader and HID key libary:
Turn your Arduino UNO into a HID keyboard
Makey Makey - From $49.95 was $69.95
Makey Makey on Sparkfun - $49.95
- https://www.sparkfun.com/products/11511
- Datasheet, Schematics: Makey Makey Schematics
Make something like the Makey Makey with Arduino Leonardo
Make your own Makey Makey, based on Shrimp (Bareduino)
Makey Makey GO - 19$ coming soon
- 1 single button
- 1 red aligator clip
- some non interactive LEDs for stayle
- magnetic clip
- direct usb plug on device (like the BabyGnusbuino)
- is it reprogrammable to choose the keystroke? function buttons?
- instructions.. .following
On Kickstarter since May, delivery until november?
BareConductive Touchboard - £90.00
Based on ATMEGA 32u8 Leonardo, uses capacitive sensing, conductive paint
Seems they use an additional chip for the capacitive sensing, MPR121. Prize ca 1-2$ on the real!
At sparkfun a breakout board is available for 9$.
Nice they don't do any "open-washing". good engineering and in the end... all the code is here:
ototo.fm - 60£
Based on ATMEGA 32u8 Leonardo
can be detected as USB device
play dircetly some sounds, using the mozzi library
https://www.youtube.com/embed/pFRl5bvVOnY
Scratch - free
Create stories, games, and animations Share with others around the world. A creative learning community with 8,808,476 projects shared. With Scratch, you can program your own interactive stories, games, and animations — and share your creations with others in the online community. Scratch helps young people learn to think creatively, reason systematically, and work collaboratively — essential skills for life in the 21st century. Scratch is a project of the Lifelong Kindergarten Group at the MIT Media Lab. It is provided free of charge.
Questions and Considerations
Vendor ID ?
What about this vendor ID. Does anyma have one?
From Adafruit Trinket Pro:
From V-USB
Prototypes
Gallery
Coconut speakers, made in ANET by Chandni Venkataraman
Videos
The Center for Alternative Coconut Research
More about Coconuts
The Center for Alternative Coconut Research
- website coming soon...
Deejay: The World’s Trendsetter in Hybrid Coconut Seedling Production!
The Coconut Palm Man
The other... Coconut Research Center. Dr. Bruce Fife a.k.a. “Dr. Coconut” answers your questions about coconuts:
The Coco-Mic - The DIY Studio Quailty USB Mic (MEMS technology)
Global distribution of the Coconut Palmtree
Coconuts in Pop-Music
