We found this circuit in American documentation from the 1980s. Transistors can be of general use. The frequency range of the generated signals ranges from 500 kHz to 10 MHz.
This circuit is from a 1967 General Electric SCR manual. The capacitors are polyester and the...
This timer uses common components today. It activates a relay after intervals that can be adjusted up...
This interesting circuit found in an Elektor from the 90s controls loads in four quadrants of the driving...