Found in a 1968 EEE, this circuit accepts frequencies from 1 to 1000 Hz and control voltages from 0.1 to 15 V. The operational amplifier is from the era and can be replaced by modern equivalents.
Suggested by Intersil in documentation from the 90's, this circuit is valid for modern operating...
The photo FET is not a common component today. In this 1964 Electronic Design application we have a light...
August 2017 - This Maxim component, available from Mouser Electronics, is ideal for wearables,...