This circuit was obtained from an 80's Electronic Engineering. The circuit detects ice formation by triggering a warning light. The operational amplifier is of the time.
This circuit published in the November 1964 Radio Electronics magazine powers a light bulb but can...
This amplifying stage is found in several circuits on our website. The coils depend on the...
This radio for the medium wave band was found in an old American documentation. The transistors are made...