We found this mains-powered switch circuit in Electronics Now magazine from July 1994. It could be used in a table lamp or touch control.
This circuit was obtained from an English magazine from 1979, but it can be easily assembled today...
This is the normal circuit of a relaxation oscillator using an unijunction transistor such as the...
This sophisticated NiCad battery charger was found in a 1990s Elektor. The components used are...