XO Peripherals

Peripherals Overview:

The 10 cent O'Scope Adaptor

see: Oscilloscope adaptor

The 25 dollar BioSign/TeleHealth

see: TeleHealth Module

The 100 dollar Projector

• Mary Lou may already have a design for this --DyD
• Ultrabright LEDs
• High resolution, high colour LCD
• Diverging Lens?
• USB to LCD processing ICs
  • USB micro controller
  • USB to digital graphics converter
  • LCD controller

The 25 dollar USB measuring unit and sensors

see: Technical specification

The 50 cent AM radio receiver

• MK848
• Analog processing for control of tuning cap
• Tuning cap
• Ferrite
• Coil
• USB powered

The 1 dollar AM radio transmitter

• Crystal or Ceramic Resonator
• audio transformer for modulation
• USB powered

The environmental monitoring dongle

• CDS
  • Generic
• Thermometer
  • MCP9700
• Humidity

How to do it

• Via an AVR micro controller with USB, ADC, and/or DAC
  • avr-gcc, avr-libc and avrice
• Via the 5v@500ma offered per USB port, with a total of 1A
  • Soft limit via power rail; it is not necessary to follow proper USB 2.0 protocol and/or complete a USB handshake
• Via the mono mic-in/stereo audio out, see Audio hardware
• Via the unused channels on the AD188 chip
• Via the Measure / Oscilloscope Activity

Peripherals People

• I'm trying to compile a list of individuals for a mailing list/management purposes
  • Arjun Sarwal
    • arjun@laptop.org
    • arjs on irc
    • Wrote the Measure activity while interning for OLPC last summer
  • Joshua Seal
    • joshuas@belkin.com
    • joshua@laptop.org
    • Works for Belkin, currently developing a slew of OLPC Peripherals
  • Zdenek Broz
    • Has group of developers at Brno University of Technology(Czech Republic) working on a USB microcontroller/ADC platform
  • Ian Daniher
    • it.daniher@gmail.com
    • Currently focusing on the TeleHealth Module and O'scope adaptor
    • DyDisMe on irc.freenode.net
  • Bernardo Innocenti
    • _bernie or _bernie|home on irc.freenode.com
    • Has experience programming Atmel Chips(ARM/AVR), Motorola, Intel, PPC, Texas Instruments...
  • Richard Smith
    • smithbone on irc
    • is part of the supercharger team, using a board based on the Atmel AT90SAM7
      • http://wiki.laptop.org/go/Multi_channel_battery_charger
  • Rafael Ortiz
    • dirakx or dirak1 on irc.freenode.net
    • wrote most of EKG page

• • Your Name Here
    • email or irc alias
    • skill set or such

Other Pages

• USB Peripherals
• Fun hardware
• Hardware Power Domains
• USB ethernet adaptors
• Measure
• Open_Hardware