This circuit visually indicates that a high voltage is present in an outlet or other point. The neon lamp is common, and the appearance of the assembly is suggested in the same figure.
This circuit activates a relay when the water reaches the sensors. The circuit is from a magazine...
The circuit, from Motorola's 1993 Linear Interface ICs, uses an unusual operating system today....
Decade counters, such as the 4017, can be cascaded as sourcing signals with the frequency divided...