<< Remote Controlled LED Lamp

01/06/09 - Christmas in a Jar

This little lamp doesn't look like much. It fits inside a little jam jar which happens to have two flat faces. The works include a battery, six LEDs and two mercury switches. Upright the lights are off, but as you rotate the jar the red and green LEDs go on and off. Rest it on one face to see red. Rest it on the other to see green. If you turn it just right all of the LEDs glow red and green. What could be more Christmas-y than that?

It doesn't look like much in broad daylight.

One angle turns on the green LEDs.

Another angle turns on the red LEDs.

Keywords: lamps, science, christmas