This circuit was found in an old American publication. It is valid for any operational. Formulas for component calculations are given next to the diagram.
This simple timer uses one of the six inverter ports on a CMOS integrated circuit. Rx and Cx...
This circuit can be used as a residential doorbell. We found it in an English publication from...
In the old original version of this circuit from 1989, the LED is common (we recommend 330-ohm...