Based on NXP 74HC logic, this circuit can be adapted for various uses. The circuit can also be used with 12V power, and the circuit replaced with a common 4046 PLL.
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...