An LED is commonly used as a "power on" indicator for many electronic devices. For the LED to produce discernible visible light in daylight, the forward-bias current needs to be in the moderate range ...

This simple Mock Flasher LED simulates the indicator of a sophisticated Alarm system. It can be placed in doors, gates and vehicles to confuse intruders. The circuit is too simple using a Unijunction ...

In addition to a likely improved processor and camera sensor, it appears that Apple’s next-generation iPhone will include a dual-LED Flash. In light of reports and part leaks pointing to this new ...