This integrated amplifier was found in a non-existent British magazine from 1975. The used integrated circuit is still popular and the mono bridged version can provide 36 W output power. 4 A.
The LM195 is a fast power transistor from National Semiconductor not very easy to find today. C1...
This circuit was found in a 1976 magazine. The circuit emits a sound when a balance sensor placed on...
This circuit with the CK722 was found in a Raytheon publication from the 60's. The relay is of the...