Base Shield for Raspberry Pi With ADC chip MCP3008

This is a Crow­tail base shield for Rasp­ber­ry Pi with UART/I2C/Analog/Digital inter­face. All the Crow­tail mod­ules can be plugged onto Rasp­ber­ry Pi through this base shield. More­over, this shield has an on-board ADC chip so that ana­log out­put mod­ules can be used on Rasp­ber­ry Pi. The ADC chip used is MCP3008. It talks to Rasp­ber­ry Pi using SPI inter­face.