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Digital Analog Converter - MCP4802/22
The MCP4802 is a dual 8-Bit Digital Analog Converter with SPI interface. The MCP4822 is the 12-Bit version.
WiringPi and the MCP 4802
To connect the MCP 4802 to the Raspberry Pi connect the SPI pins of the MCP4802 like that:
MCP4802 Raspberry Pi Vdd 5V CS CE1 SCLK SCLK SDI MOSI Vss GND LDAC GND
Before using the Wiring object enable the SPI interface in:
$ sudo raspi-config