This circuit was found in an old factory documentation. The circuit uses single-junction transistor SCRs at the time. These components support modern equivalents.
This 1980s documentation circuit uses a 741 in a different high-speed comparator configuration. The feed...
This circuit activates a relay with a frequency signal determined by the adjustment components. The...
This simple circuit, based on an astounding 555, was found in a 2001 documentation. The circuit...