This type of indication is used to indicate the position or movement of the train in hidden areas of your layout, such as tunnels and underground areas, or parts of the layout you just cannot see from the control area. The Train Position Sensor Kit can be used on its own or with the Relay Card (EM134). The kit consists of the following components.
The basic circuit for a simple panel indication is shown opposite. The higher the value of the capacitor the longer the LED will stay on - the value in the kit will keep the LED on for 2 to 4 sec