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 ...

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

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 ...

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 ...