20. Your fully built Expert System should now look like
this when powered and with signals being sent to both
monitors.
ClockOne and TallyOne Operation
TallyOne:
The TallyOne uses a DC power input jack that accepts a standard 2.1mm plug, with center positive. Input power is
nominally 12VDC at 1.2 amps maximum .
Connect the provided light sensor to the Sensor input on the tally. Then place the sensor end over the tally light on
your camera. Make sure all light is completely blocked out from the sensor or else the sensor will have difficulty
sensing light changes on the camera tally. Use the ADJUST dial on the side of the tally to adjust the sensors sensitivity
to light. Turn the DIGIT dial to change the number displayed on the front of the tally.
Connect the provided 3.5mm cable to the Repeat input and plug it into the Sensor input on the Clock One. The Re-
peat 3.5mm jack provides a contact closure to ground when digit display is red. This output can be used to drive the
sensor input on another device such as a ClockOne or another TallyOne allowing daisy chaining of multiple devices
from a single optical sensor or contact closure source
The red light on the rear of the tally will illuminate when the cameras tally is lit.
