http://ourworld.compuserve.com/homepages/Bill_Bowden/page5.htm#shift.gif
http://www.devrs.com/gb/files/gameboy2.gif
It runs 8 white LEDs at 25mA of current with only 70mA of supply current at 12V. A high frequency switching regulator us used to reduce the power loss associated with multiple current dropping resistors.
http://www.solorb.com/elect/solarcirc/dc2dc8led/index.html
This flashlight has three different modes of operation, regular flashlight, flashing LEDs, and sound-operated light.
http://www.electronicpeasant.com/projects/ledlamps/ledflash.html
Industry-Standard-Character-LCD General info and code-examples.
http://home.iae.nl/users/pouweha/lcd/lcd.shtml
A simple resistance measurement circuit which shows if resistance is smaller or higher than the threshold set to circuit. The output is using two LEDs
http://www.kolumbus.fi/mikko.esala/johtavuusilm.pdf
a multi-part introduction for the basic understanding of Liquid Crystal Displays
http://www.ee.washington.edu/circuit_archive/text/LCD.html
http://www.web-ee.com/Schematics/LED_AMP/LED_AMP.htm
http://ourworld.compuserve.com/homepages/Bill_Bowden/page11.htm#meter.gif
simple 10 LED chaser.
http://www.aaroncake.net/circuits/chaser.htm