This circuit was found in a Popular Electronics from the 90s. It is based on components still common today and an optical coupler for the triac. The sensor is a thermistor.
Found in a Popular Electronics from the 1990s, this circuit uses components from National...
This combination key or code key was found in old documentation. The consumption is very low, and...
This circuit was found in a European documentation from 1964. The circuit makes use of components of...