Where to buy from:
A. Problem Definition
Xbee modules are popular radio modules for ATMEGA based microcontrollers. However there isn't a cheap solution in the market that integrates the two together.
B. The Solution (Yields to over 50% in savings!)
The Single circuit Arduino-Xbee (SCAXb) is a unique and inexpensive solution - in the sense that it is a complete Arduino board at just 3" X 3" with the added functionality of an XBee wireless module being integrated right into the board! What's more, unlike other expensive solutions which exclude the XBee module, the price of this kit at just $35 includes the XBee module too. Designed using the Eagle PCB software, this circuit provides an integrated microcontroller-Xbee interface, optionally extends the 6 analog pins on the typical ATMEGA microcontroller using two 4051 multiplexers and also the output pins using two 74HC595 8-bit serial-in, serial or parallel out shift registers (Perfect for sensors, LEDs, etc for your application)
A transistor is added for wirelessly programming the ATMEGA that momentarily pulls the controller's reset pin to ground. Power supply pins and connections to 4 servo motors are available. A voltage regulator ensures a constant 5V to the circuit. We include the free Schematic and Information Booklet for this circuit with your purchase. This circuit can also be custom-modified according to your needs if you wish to add other features such as FT232 USB to serial communication or special chips that serve the needs of your project. In fact SCAXb Ver. 2 is already under production and includes the FT232 USB connection. Compare this product ($35) with the total cost of spending on an Arduino Board ($29.95) + Xbee Shield (24.95) + Xbee Module ($22) = $76.9.
Visit: myra-robotics.com for more information