Jova Solutions TIMS-0102 USB to I2C and SPI interface adapter offers a quick and easy method of communicating with I2C and SPI devices and circuits. The TIMS-0102 module is completely self-contained and powers itself from the USB interface. The design programmable logic, and programmable clock-rates, all to support rapid prototyping of circuits that use the I2C and SPI protocols.
Small Size and Low Price
Quick and Easy I2C and SPI Master Mode Communications
USB 1.1/2.0 Full Speed Interface
Windows, Linux, and LabVIEW Drivers
USB Bus Powered
http://www.jovasolutions.com/tims-0102-usb-to-i2cspi