This circuit, found in a 1958 magazine, is for reference only, since the components are not easy to find today. The transistors are germanium types and power supply is made by common cells.
This circuit is from a 1968 documentation using one of the first integrated circuits available at the...
The MC1436 can also be used on this circuit suggested by the 1993 Motorola Linear Interface ICs. The...
August 2017 - This Maxim component, available from Mouser Electronics, is ideal for wearables,...