Abstract: System and methods for determining time intervals of sporting events having a transmitting device that has multiple light transmitters configured to communicate light signals, a receiving device communicatively connected to the transmitting device via multiple receivers configured to receive the light signals communicated from the transmitters. The light signals being configurable into an electronic gate extending between the transmitting device and the receiving device such that light signals between the transmitters and receivers form the gate, and a pendant device communicatively connected to the transmitting device and the receiving device in a closed network that enables additional similar networks to be established without interfering with the determination of time intervals.