Found in RCA documentation two years 70, this circuit triggers an incandescent lamp at dusk. The circuit uses an LDR of the time.
Found in Radio Electronics from the 90s, this circuit generates signals from 100 Hz to 1.5 kHz....
Operating in the range of 1.5 to 15 kHz, this sinusoidal oscillator is based on a 741 operational. The...
This circuit was obtained in a 1973s documentation. The transistors may be BC558 for the PNP and...