The circuit presented is from 1994 and can be developed with more modern operators. We found the configuration in the National Semiconductor Linear Applications Handbook.
With the coded activation of the relays, it is possible to control which of the 16 outputs...
The integrated circuit used in this application is not very common. Transistors and resistors...
This simple circuit makes use of neon lamps to indicate the voltage of a power grid. The lamps are...