We found this circuit in the 1982 SGS linear integrated circuit manual. The L149 is not common today and the circuit can be implemented with equivalents.
This high current regulator with low voltage drop was found in the datasheet of the used...
Coupled to a bell, this year 2000 circuit provides an indication for attendance, if the person is...
This circuit lights up a warning LED (tilt) when a device in which the mercury key is located is...