We found this Vox in a 1969 Motorola documentation. Transistors support modern equivalents and the SCR can be a TIC106. The reset is done by a push button.
Found in the 2005 Linear Technology Application Manual, this circuit controls the torque of a...
This circuit was found in a 90's Electronic Design. It takes advantage of the nonlinearity...
We found this circuit in an English publication of 1976. It can be easily assembled by changing the...