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 found in a General Electric documentation from 1965. The circuit is full wave for...
This is another quick adder that we found in an Electronic Design from the 80s. It also applies to...
This circuit uses two sensors that are placed at the intersection of a miniature railroad, causing the LED...