An error has occurred. Please try again. With a The Portland Press Herald subscription, you can gift 5 articles each month. It looks like you do not have any active ...

You are able to gift 5 more articles this month. Anyone can access the link you share with no account required. Learn more. WOOLWICH — When bright red lights began ...

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 ...

A sign attached to a lifeguard chair warns of hazardous swimming conditions at Pere Marquette beach in this file photo from 2007. In 2010, the city of Muskegon removed lifeguards from the beach and ...

This simple and cheap circuit is not just for Christmas! There are just two resistors, a small-signal transistor such as a BC547, one ‘flashing’ LED and a string of ‘normal’ LEDs. The flashing LED ...