Pictures: http:https://imgur.com/a/TQshe Video: http:https://youtu.be/ay8awluwBV4

Idea: Use an RGB led strip (http:https://www.ladyada.net/products/rgbledstrip/), powered from a ULN2003 chip, to automatically light up the room with a soft light when a person enters the room at night.

A PIR (12V, dry contact - security alarm type) will trigger the lights to fade-in with a soft ambient light. An off switch will be used to fade the light off when exiting the room.

An ambient light sensor (light dependant resistor) will monitor the light in the room so the night light will not operate during the day, or when the main lights are turned on.

The PCB includes on-board buttons and a RGB led for testing without additional hardware.

Limitations: ULM2003 is limited to 500mA per output, meaning each colour. LED strips are typically 115mA/Metre, but check with a multi-meter first.

Inputs are designed for normally open contacts, but this can be changed in the code.

The RGB Fade in-out code is by Clay Shirky [email protected] via http:https://arduino.cc/en/Tutorial/ColorCrossfader

The rest of the code is released here under the Creative Commons CC BY-NC-SA License http:https://creativecommons.org/licenses/by-nc-sa/3.0/au/

Jordan Heywood - [email protected]