The circuit shown in the figure can be designed with more modern operational amplifiers, as it is from 1994 documentation by National Semiconductor. The power supply must be symmetrical.
This circuit was found in a 1999 publication. Its purpose is to flash two LEDs according to the...
This circuit is based on the well-known digital module ICL7107 feeding 4 displays with...
This configuration can be found in other articles in this section. This was obtained in a 2000...