The components used in this National Semiconductor circuit are not common today, but the configuration can be adapted to use more modern components.
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,...