This CMOS 4001 oscillator alternately turns the relay on and off at times set by R2. The circuit is from Electronics Now magazine, June 1995.
This circuit was found in an English publication in 1974. The integrated circuit used as an audio...
Found in a 1967 Ferranti documentation, this regulator makes use of an operational amplifier of the...
This configuration appears elsewhere on this site. It uses the LM101, which are not common today,...