advanced line following robot problem

[shreyansh]

                                       (Please help me with these questions)

1) I am not able to understand what is the device used in advance line following    robot schematic at the lower left corner with three pins which looks as a triangle in shape.

2) In advance line following robot schematic status led is showing 3 wires and in led there are only 2.

3) In sensor schematic where i have to connect wires on sensor board that will join the sensor array in advance line following robot schematic.

thanks.

[newInRobotics]

1) I am not able to understand what is the device used in advance line following    robot schematic at the lower left corner with three pins.

It does say LCD Power.

2) In advance line following robot schematic status led is showing 3 wires and in led there are only 2.

Don't know, possibly drawing mistake.

3) In sensor schematic where i have to connect wires that will join the sensor array in advance line following robot schematic.

Possibly to the header pins that are named "Sensor Array".