Components of light controller

This section describes the functionality of all the switches, jumpers and connectors of the light controller PCB.

Top-side of the PCB

1. MODE button: In the idle state, press this button to display the current system time. To open the system menu press and hold this button for a few seconds.
2. UP button: In the idle state, press this button to display the light on time. In the system menu use this button to navigate to the next available option of the menu.
3. DOWN button: In the idle state, press this button to display the light off time. In the system menu use this button to navigate to the previous option of the menu.
4. SLEEP LED: Indicate system idle state.
5. JP1 Jumper: Open this jumper to bypass the built-in LED driver and connect external driver circuitry to the controller. For more information refer the soldering and assembling section of this document.

Bottom-side of the PCB

1. Battery holder: Insert CR2032 or CR2025 type battery into this holder. This battery is used to maintain the system time during power interruptions.
2. 24V DC IN: Connect 24V 1A or 1.5A DC power supply into this socket.
3. LED connector: Connect the 7W LED module into this connector.
4. ISP header: Use this port to flash ATmega8 MCU of the light controller board. More detail about this port is available at Building and installing firmware section of this document.