Found in General Electric's documentation from 1970, this circuit is indicated for the so-called “Solid State Lamp” (SSL). The LED symbol in the original diagram is inverted.
We found this circuit for old tape recorders in the December 1972 Radio Electronics magazine. The...
I found this simple circuit from an English magazine from 1984. The circuit can be easily...
This windshield wiper interval was found in an old documentation. The SCR can be the C106 and the...