We found this relaxation oscillator in a 1967 General Electric documentation. The frequency is given by the capacitor. The obtained waveforms are shown.
This circuit was obtained in a Hands-On Electronics from the 90's. The circuit turns on one LED at...
Found in a 1960 Sylvania transistor manual, this circuit makes use of transistors from that era....
Found in a 1967 publication by General Electric, this control is intended for motors up to 2 A...