It has four pens (three whitening wands and one extra-strength whitening wand) that you use with the LED light for nine minutes a day. Each kit gets 75 sessions, so you do get a good bang for your ...

Light Pen Light pens provide a very precise pointing capability directly on the screen. First Light Pen This handmade prototype of a "light gun" in 1952 was part of the Whirlwind Project at MIT.

You could, of course, use a light pen with most of the old 8-bit home computers, including the Commodore 64. [Jan] has a soft spot for the light pen on the C64. So much so he made a new input devi ...

Using a device called Graphic 1, they can draw and manipulate circuit designs directly on a cathode ray tube with an electronic light pen, allowing for rapid prototyping and testing of ideas.

A new patent could hint at a future Surface Pen can harvest its power from the LEDs in your Surface's display. When you purchase through links on our site, we may earn an affiliate commission ...

The Light Designer is a pretty unique toy that lets kids write on a cone-shaped POV display with an infrared light pen. [Harry] cracked ... [Harry] decided to use a Leostick (Arduino Leonardo ...