This tone control was obtained in the Audio Handbook of the National Semiconductor of 1977. The circuit controls the signals of medium frequencies in a wide dynamic range as shown in the diagram.
This circuit for heating elements was taken from a 1966 General Electric manual. The SCRs are...
This circuit also detects leaks and rain. I found it in a 1967 English magazine, but it can be...
August 2017 - This Maxim component, available from Mouser Electronics, is ideal for wearables,...