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.
This circuit was obtained in a 1980 publication. The transistors can be BC548 or 2N2222. The...
We found this circuit in an old documentation. Its purpose is to turn on warning lights when the...
This circuit uses the Linear Technology LT6505 and was found in a 2005 manual. The circuit is for 24 V...