This circuit is suitable for the calibration of old analog oscilloscopes. It was found in documentation from the 1970s and could be useful if someone is recovering an oscilloscope of the time.
This circuit is from a 1957 Raytheon transistor manual. The diode can be of general-purpose...
This proximity switch or approach relay uses only transistors and directly controls a Triac. The...
The circuit presented here shows how two flip-flops of a 4027 can be connected to perform a...