This circuit was found in 1980s Radio Electronics. The circuit includes the power supply. The ICL8038 circuit was very common at the time in this type of application.
This basic relay configuration was found in a July 1994 Electronics Now. The relay is supposed to be...
This HeNe laser power supply was found in the March 1989 issue of Radio Electronics magazine. This...
This circuit, using a unijunction transistor (UJT), converts a voltage applied to the input in a...