This circuit is from a 1970 General Electric documentation. It can be found with variations on this website. The components used are common today.
The gated oscillator shown here turns on when a “1" Iogic Ievel is applied to the input. The...
Found in a 90’s Radio Electronics, this circuit uses a component from the time, difficult to find today....
In the figure we have a circuit where two 555 operating one as astable and the other as monostable...