The circuit shown is from the 1994 Linear Applications Handbook by National Semiconductor. Some of the components are not currently common and should be looked for equivalents.
This circuit, which uses a planar silicon sensor, is from a 1964 Electronic Design. The component...
This circuit is from 80's documentation. Operational equivalents can be used. The power source is 5 V...
Delayed Pulse Generator This can be considered an "advanced" application where two 555 integrated...