Reverse engineered circuit diagram of an LED night light made by a north american manufacturer. Remarkably it only draws 100mW and has some surge voltage immunity. A clear plastic light pipe is used to diffuse the light from the LED into the room.
Reverse engineered circuit diagram of another commercial LED night light. This one has a photocell to turn the light off during the day. It also uses light pipe techniques to make the little LED look like a larger lamp. The photocell circuit has hysterisys so that for all intensive purposes the light is always either fully on or fully off.
Reverse engineered circuit diagram of a commercial LED christmas bulb for outdoor chains. The circuit board, which sits inside the plastic lamp just above the screw base, has a spot for a zener and capacitor which are not installed.
Reverse engineered circuit diagram of a commercial LED fiber optic night light. The circuit board and LED's are mounted inside a plastic case with ventilation holes. The light is particularly bright.
I do not gaurantee the accuracy or safety of any information herein.
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