We found this circuit in an old documentation. The integrated circuits used are specific to produce effects and do not admit equivalents, being currently difficult to find.
This traditional configuration from a simple 12 V source is from a 1977 publication. The...
This circuit for shunt motors was found in an American 1980s documentation. The SCR should be rated...
This very simple amplifier was found in the Philips Databook of 1990. The circuit is suitable for...