Hi. Since it seems like this type of questions comes up every now and then. So, here's a quick list of other resources to look at: For something to use in the lab, dataq is one of the main companies that businesses go to for low-cost/mid-range solutions. A very cheap whay to get a few I/O pins and have it in a packaged form is: DI-158 Starter Kit Low-Cost USB Data Acquisition Device http://www.dataq.com/products/startkit/di158.htm[^] * Low-cost, compact, USB data acquisition starter kit. * Record data with 12 bits of measurement accuracy at rates up to 14,400 samples/second. WinDaq High Speed Acquisition software required for recording rates over 240Hz. * Convenient USB interface. * Four ±10V or optional ±64V fixed differential inputs. * Four digital bits for general purpose I/O. * Two 0V to 1.25V digital to analog output ports. Another pre-built board to consider is: http://www.xdimax.com/sub20/sub20.html[^] SUB-20 Multi Interface USB Adapter USB to I2C, SPI, GPIO, RS232, RS485, Ir, LCD * Full Interface Crosspoint - converts any to any * USB to I2C Master and I2C Slave, USB to SMBus * Up to 8MHz USB to SPI Master and SPI Slave * USB to GPIO - 32 GPIO, PWM Outputs * USB to ADC - 8 Analog Inputs (A/D Converters) * USB to RS232, USB to RS485, USB to ModBus * USB to IR (USB to Infrared) Adapter * 8x2 LCD, Leds, Push Buttons * Field upgradable and customizable * NI LabVIEW Support If this is for an end product or for a board, and you want to use Ethernet for connectivity, then Lantronix has a number of good solutions: Good solution for a board: XChip Direct SoC http://www.lantronix.com/device-networking/embedded-device-servers/xchip.html[^] Embedded Device Gateway SoC Co-Processor XChip * Connects to host microcontroller for serial to Ethernet (LAN) applications * Robust networking and applications firmware included – no coding required; zero royalty licensing agreement * Integrated 10-100 MAC/PHY; 256K SRAM; up to 230 Kbps data rate * Compact 12mm x