Passengers talk about the Pennsylvanian, an Amtrak passenger train that runs between Pittsburgh and Philadelphia. It was announced that the line may cease in October of 2013. (Video by Michael Henninger; 2/17/2013). think it would be worth it for Amtrak and PennDOT to see if more schedule diversity might make it a more popular travel option, Ms. Katchmar says. â¢ Go to post-gazette.com for a slideshow of photos taken aboard the Pennsylvanian and a video report. Jon Schmitz: jschmitz@post-gazette.com or 412-263-1868.
A light-emitting diode (LED) is a semiconductor device that creates light using solid-state electronics. A diode is composed of a layer of electron rich material separated by a layer of electron deficient material which forms a junction.
An infrared LED is a tiny light emitting diode used to power devices such as remote controls. The wavelength transmitted by infrared light carries a signal that tells devices what to do (such as, with the remote, telling it to change the TV channel). Differences between Infrared & Visible Light LEDs.