Found in an Electronic Design from the 90s, this circuit generates a mathematical function given by the formulas next to the diagram. The basic component is from the period.
This experimental amplifier was found in the 1960 Mullard transistor reference manual. The...
This circuit from Motorola is from 1968, appearing elsewhere on this site. The transistors admit...
This circuit triggers the LED when the monitored battery voltage drops below 9 V for 12 V...