That’s the question [Kathy] asked when she built this LED matrix light pen project. It looks simple enough – a 64-LED matrix illuminates as the pen draws shapes. But how does the circuit ...

Sometimes the simplest of projects end up revealing the most interesting of things, as for example is the case with [Ryo Mukai]’s light pen for the Vectrex console. It’s an extremely simple ...

A pen-equipped tablet would need to be extremely effective to function; in other words, it would need to have a sizable ...

Unlike those digital notebooks ... reduces reflection and glare while also simulating the feel of a pen on paper. It has a “Light Color Mode” that reduces the screen’s saturation to create ...