This is a flashing led lights circuit powered from a 12V DC power supply that uses the well known 555 IC. Flashing lights have many and varied applications in life. They are used as warning lights on ...

I REFER to “Beware of Flashing Bright Blue Light ” (The Star, Nov 1). With the LED technology becoming more widespread, almost all outlets selling LED lights are also selling flashing bright blue LED ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. SAN DIEGO ...

A trial last year assessed how the installation of additional flashing LED beacon lights on the front and side of trains affects their visibility at level crossings.