This circuit was obtained in a 1967 General Electric manual. The circuit applies to other triacs. The other components are common today. The load is inductive.
Found in a Popular Electronics from the 1990s, this circuit uses components from National...
We found this circuit in an old documentation from 1988. The circuit captures the heartbeat...
This oscillator, from an old Argentine publication from 1973, uses the inductance of the 500 ohms...