Arduino already include on-chip PWM controllers, making this effectuation easy. In short, PWM is a way of digitally encoding analog signal levels. MyDuino! Looking for a solution to build this circuit ...

Municipalities nationwide have switched to LED traffic signals because they burn brighter and save money by lasting longer and using 90% less energy than incandescent bulbs.

A dispute between bureaucrats and elected officials, and questions about funding have prevented Los Angeles from replacing traffic signals that go dead during blackouts with ones that can operate ...

As LED traffic signals continue their inexorable march across the country, municipalities have to do something with the “obsolete” ones. Often they’ll just give them away.