Found in a Popular Electronics from the 90s, this circuit can be adapted to use modern operational amplifiers. The output voltage is the square root of the input voltage.
This circuit was obtained from a Hands-On Electronics, an American magazine from January 1987. The...
This circuit is from 1972 documentation. The circuit detects when the voltage input is in the...
This circuit generates a 5.3 kHz linear ramp with the indicated components. The 7555 is the CMOS...