This circuit was found in a 1965 General Electric documentation. SCRs and unijunction may be current equivalents. The circuit has period adjustment and symmetry.
This sensitive motion sensor with inductive sensor was found in a 90s Elektor. The circuit uses only...
This simple balance indicator for sound equipment was found in a 1982 documentation. The M1...
This circuit was found in a 1992 documentation. It uses a photo diode as a receiver and an...