This circuit from General Electric was found in a 1967 documentation. The SCR is of the time, as are the transistors, but equivalents can be used.
This conventional circuit is from Motorola's 1993 Linear Interface ICs. The power source must be...
This oscillator can be controlled by light if we use an LDR as a sensor, or by temperature, if we...
This circuit was found in the August 1994 issue of Electronics Now magazine. The 4046 is uncommon...