The RDM Responder has built-in support for the following Sub-devices :
MCP23S08
8 digital output lines. Default clock speed : 2 MHz.
MCP23S17
16 digital output lines. Default clock speed : 2 MHz.
MCP4822
2 analog output lines. Default clock speed : 15 MHz.
MCP4902
2 analog output lines. Default clock speed : 15 MHz.
SPI_DIO
7 digital output lines.
SPI_LCD
16x2 LCD
SPI_7FETs
The 7FETs board is capable of sinking about 1A per output.
SPI_RELAY
The Relay board allow you to drive two relays.
SPI_DIMMER
This ia a dimmer board suitable for resistive loads of up to 4A (suitable for both 230V and 115V power systems).