OUT1 (1) +5volts Vcc (3) GND GND, CTRL (4,5,6) We powered the DS1077 from the Bus Pirate’s 5volt power supply. Two resistors, R1 and R2, pull-up the I2C bus to 5volts when it’s not in use. Capacitor C1 is 0.01uF and C2 is 0.1uF, as recommended by the datasheet. Control pins