This circuit is a driver for R-2R network of AD converters. We found it in manufacturer documentation from the 1980s. The configuration can be adapted to be used with modern operationals.
We found this circuit in a 1965 magazine. The circuit can be assembled with current equivalent...
This is a typical circuit of a PROM programmer from the 70s. It appeared in the magazine Radio...
If there is an indispensable household appliance in our kitchen these days it is the microwave...