There is a blue and red LED mounted on both sides of the drive.

The center display for sound system was all red LED but is now full colored.

The camera used a red LED to put a green dot on the negative.

A red LED found on the front of the camera will flash to indicate to the player if the light is too low.

The red LED can also be used to check if you have the correct polarity.

Early red LEDs were notable for their short service life.

Pressing select sends a signal that should cause his red LED to light up.

Usually red, green and blue LEDs are used to get a wide colour range.

The blue and red LEDs get closer to their theoretical limits.

Portable games have come a long way since the days of blinking red LEDs.