This circuit generates output pulses with sequential delays. The delays can be programmed by the values of the resistors and the capacitor. The supply voltage can typically be between 5 and 12 V.
The circuit shown is from an old European publication. In it we have the way to activate a relay...
We found this circuit in a European publication from the 1990s. Transistors are still common types...
This circuit was found in an American documentation and can be added to common amplifiers of any...