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.
This circuit was obtained from an American publication from the 80's. We can use a BD136 instead...
This oscillator for the practice of telegraphy provides a good sound in a loudspeaker, with only...
This simple circuit to monitor the frequency of the power grid uses an analog indicator. The...