Viper Board (includes USB cable)
Nano River Technologies second generation I2C/SPI/GPIO adapter.
SPI/I2C master and slave with line rates up to 12MBit/sec. 32 GPIOs configurable as digital I/O, analogue input, PWM, single or continuous pulsed.
Open source demonstration examples with full professional documentation provided for Windows, Linux or Apple.
Includes USB cable.