Signal to H-Bridge used to control IR Source On/OFF {1/0} Connects to T1IN of MAX232 device. Provides RS232 data output for system. SPI Serial Data Output pin that connects to the Microchip MCP4822 DAC device SPI Clock Output to... Electronics Projects, dsPIC30F2012 pulse oximeter 2X8 character display "dspic projects, microchip projects, microcontroller projects, " Date 2019/08/02