Science, Technology, Electronics, Reference - Clocks with Nixietubes. Various types of time keeping devices made with Nixie tubes and Nixie tube like componenets.
Science, Technology, Electronics, Reference - Circuit Center. A free source of SPICE circuit files and tutorials for simulating and analyzing electronic circuits.
Science, Technology, Electronics, Reference - The Electronic Peasant. Dedicated to inexpensive Do-It-Yourself music electronics, electronic salvage/recycling, and alternative energy projects.
Science, Technology, Electronics, Reference - Electronics Lab. Useful circuits with full description, diagrams and PCB, electronics articles, links and downloads.