This circuit uses a resonant reed switch at the trigger frequency. The circuit is from General Electric in a 1966 documentation. This type of component is rare today.
This simple circuit that senses energy cables (alternating current) through the field produced was found...
This third-order filter was found in a 1975 publication. The circuit must be powered by a...
This circuit that also has a Power On reset was obtained from a 2005 Linear Technology manual. The...