2R Hardware & Electronics

2R Hardware & Electronics


Arduino Wireless SD Shield

Posted: 14 Aug 2012 01:29 AM PDT

The Wireless SD shield allows an Arduino board to communicate wirelessly using a wireless module. It is based on the Xbee modules from Digi, but can use any module with the same footprint. The module can communicate up to 100 feet indoors or 300 feet outdoors (with line-of-sight). It can be used as a serial/usb replacement or you can put it into a command mode and configure it for a variety of broadcast and mesh networking options. The shields breaks out each of the Xbee's pins to a through-hole solder pad.

Included on board is a SD card slot. When using the SD Library to access the card, Pin 4 is CS and cannot be used otherwise. SPI also relies on pins 11, 12, and 13 for communication.

An on-board switch allows the wireless module to communicate with the USB-to-serial converter or with the microntroller.

The Arduino Pro

Posted: 14 Aug 2012 12:20 AM PDT

The Arduino Pro is a microcontroller board based on the ATmega168 (datasheet) or ATmega328 (datasheet). The Pro comes in both 3.3V / 8 MHz and 5V / 16 MHz versions. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a battery power jack, a power switch, a reset button, and holes for mounting a power jack, an ICSP header, and pin headers. A six pin header can be connected to an FTDI cable or Sparkfun breakout board to provide USB power and communication to the board.

The Arduino Pro is intended for semi-permanent installation in objects or exhibitions. The board comes without pre-mounted headers, allowing the use of various types of connectors or direct soldering of wires. The pin layout is compatible with Arduino shields. The 3.3V versions of the Pro can be powered with a battery.

Summary
  • Microcontroller ATmega168 or ATmega328
  • Operating Voltage 3.3V or 5V
  • Input Voltage 3.35 -12 V (3.3V versions) or 5 - 12 V (5V versions)
  • Digital I/O Pins 14 (of which 6 provide PWM output)
  • Analog Input Pins 6
  • DC Current per I/O Pin 40 mA
  • Flash Memory 16 KB (ATmega168) or 32KB (ATmega328) of which 2 KB used by bootloader
  • SRAM 1 KB (ATmega168) or 2 KB (ATmega328)
  • EEPROM 512 bytes (ATmega168) or 1 KB (ATmega328)
  • Clock Speed 8 MHz (3.3V versions) or 16 MHz (5V versions)