This circuit can be used to obtain a zener voltage from a common zener of another value, adjusting in a multimeter. The circuit is from an American documentation of the 1970s.
The 4007 integrated circuit consists of 4 MOSFETs that can be used separately. The figure shows how...
August 2016 - It can be obtained from Mouser Electronics new operational amplifiers with extremely low...
This circuit triggers an alarm in the event of a power failure. The circuit is from an 80's...