http://www.aaroncake.net/circuits/cdsupply.htm
modern portable systems require protection from an arsenal of potential overcurrent problems.
http://www.edn.com/archives/1996/050996/10df6.htm
power-on self-test card with remote display
http://www.edn.com/archives/1994/120894/25di2.htm
a mini-central that tells you when a letter is waiting you in the mailbox and if someone rung your bell when you were not at home.
http://www.nutchip.com/progetti/postino/postino_en.htm
explained
http://www.microconsultants.com/tips/pwrfact/pfarticl.htm
http://www.tkk.fi/Misc/Electronics/circuits/rspower.html
from car +12V power
http://utter.chaos.org.uk/~altman/mp3mobile/#Techie
on-line book on making your own holograms
http://www.holo.com/holo/book/book1.html
http://www.edn.com/archives/1995/081795/17di5.htm
http://www.edn.com/archives/1994/051294/10di10.htm