indicates low-battery condition
http://www.edn.com/archives/1997/010297/01di_04.htm
http://www.nutchip.com/progetti/led_flasher_en.htm
32 steps of brightness control from 0 to 100%
http://www.web-ee.com/Schematics/LED%20Dimmer/LED_Dimmer.htm
a nice lamp that is low power, runs cool, long lifetime, operates from 12V, puts out a warm yellow shade of light, the color may be adjusted by changing the number of red or green LED strings
http://www.solorb.com/gfc/elect/solarcirc/ledlamp/index.html
http://ourworld.compuserve.com/homepages/Bill_Bowden/page8.htm#light.gif
LED current is constant between 6 and 8 mA at 5 to 30Vdc.
http://www.uoguelph.ca/~antoon/circ/lpl.htm
runs from 1.5V battery
http://www.uoguelph.ca/~antoon/circ/ledflash.htm
http://www.epanorama.net/circuits/strobo.html
adjustable for flash rates between 40 Hz and 166 Hz based on 555 timer.
http://www.intio.or.jp/jf10zl/strobe.htm
This code is for a simple RGB LED controller for 1 RGB LED using a PIC12F675 (or PIC12F629). The pattern is determined by the data in the EEPROM.
http://www.semifluid.com/?p=8