We found this mixer in an American documentation. Operational amplifier supports equivalent and changed number of inputs. Power can be between 6 and 12 V.
We found this circuit in the Electronics Experimenter Handbook 1983 edition. The circuit uses...
This little-known regulator today was found in a Radio Electronics circuit from December 1978. The...
This circuit was obtained in a 1982 Maplin magazine. The circuit can be applied to equivalent power...