We found this circuit in a 1987 documentation. It is a multi-tester with neon lamp and LEDs operating with both low continuous voltage and high alternating voltage.
This simple transistor tester uses a common 3 mA analog instrument that has its scale changed as...
This interface or shield circuit for instrumentation was obtained in a publication from the 90's....
This circuit was found in a Spanish magazine that no more existis, Mundo Electrónico, in a...