This page lists some files that may be of help in
designing your own electronic circuits.
Learn about the fundamentals of supply decoupling in
digital circuits
A presentation about heating methods
Wiring Colours for Tube Amplifiers
An easy to build divide by 2 circuit. Comes in handy to
derive a clocksignal with half the original frequency,
to directly clock TDA1541 or TDA1547. Many other
applications too....