This old circuit, from the 80's, uses an integrated circuit that is uncommon today. The circuit is intended for loads controlled by triac and the resistors depend on the desired control.
We found this circuit in the Philips integrated circuits manual of 1990. The circuit must be...
We found this configuration in a documentation for radio amateurs from 1974. The circuit can be...
This circuit was found in old documentation but uses components that are still common. The circuit...