SC144, v1.1, PCB SC144 is dual function real time clock and I2C bus master interface card designed for the Z50Bus. LinksSC144, v1.1, PCB only (Tindie)SC144, v1.1, Complete kit (Tindie) – discontinuedSC144, v1.1, PCB design files (OSHWLab)SC144, v1.1, Gerber files (ZIP)