Found in RCA documentation two years 70, this circuit triggers an incandescent lamp at dusk. The circuit uses an LDR of the time.
This circuit is from 1993 documentation. The table provides the values of R3 and R4 according to...
This circuit is from 1982 documentation and has some interesting uses, despite its extreme...
This crystal oscillator generates a 20 MHz signal. Equivalent transistors such as BF494 and 2N2222...