Pi-SPi-8AI+ Raspberry Pi Analog Input (4 - 20 mA) Interface
The all new revised analog input interface for the Raspberry Pi is here! The Pi-SPi-8AI+ is based on the popular VP-EC-8AI 8 channel 4-20 mA input module, and the Microchip MCP3208 12 bit A/D converter.
The 26 pin GPIO port is duplicated on either side of the module, so more modules can be "daisy chained" together.
With the latest libwidgetlords v2.0 release, up to 4 PI-SPI-8AI+ modules can be connected together giving a total of 32 analog inputs to one Raspberry Pi.