This sensor circuit for currents of the order of nanoamperes was found in an American documentation from the 1980s. The components are from that time.
Although it is a common configuration today, this circuit was taken from an old publication. The...
This circuit with the LM741 operational amplifier can be applied to other operational amplifiers. We...
This version of time light with 12 V lamp and power MOSFET was found in a 2001 publication. Other...