This circuit was obtained from a 1968 documentation and can be adapted to use current equivalent components. The maximum frequency depends on the components used.
This circuit is from an English publication of 1991. With it you can use a common multimeter on...
This circuit can be found in a 1970 Motorola documentation. The circuit can be implemented with general...
Delayed Pulse Generator This can be considered an "advanced" application where two 555 integrated...