CocoMake7
http://hackteria.org/wiki/QTouchADC_Library_for_Arduino
Contents
Board Design
On GitHub
Comparison to Makey Makey
Resistive sensing vs. capacitive sensing
NO NEED FOR SECOND ALLIGATOR-CABLE!
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).
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?
ATMEGA 328P
- very widely available, prize starting around 220 - 250 IDR (3$), 3.48 from Mouser goes to 1.82 if you buy 1000.
- The smd chip has 8 ADC channels, but the DIL seems to only have 6 ADC channel on Port C, ADC0 - ADC5
- prize, ca
Download ATMEGA328 datasheet
ATMEGA 32u4, same as leonardo or the makey makye
- only smd package
- High prize, 6.32$ from Mouser
- Hardware USB support!
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 100 IDR (2$)
- only 4 ADC channels
Related Projects
HID Keyboard emulation
V-USB virtual USB emulation on ATMEGA
Trinket Pro, ATMEGA 328 with bootloader and HID key libary:
Makey Makes and Scratch
Makey Makey on Sparkfun - $49.95
- https://www.sparkfun.com/products/11511
- Datasheet, Schematics: Makey Makey Schematics
Scratch - free
Create stories, games, and animations Share with others around the world. A creative learning community with 8,808,476 projects shared. 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.
Make something like the Makey Makey with Arduino Leonardo
Make your own Makey Makey, based on Shrimp (Bareduino)
Questions and Considerations
Vendor ID ?
What about this vendor ID. Does anyma have one?
From Adafruit Trinket Pro:
From V-USB
