The purpose of this circuit is only to increase the input resistance of a multimeter, since there is no voltage gain. The batteries are 9 V and operational equivalents can be used.
The four gates of a 40111 IC are used in thes two-out circuit. The output chages their state in a...
This low power, low voltage circuit was found in old General Electric documentation. Transistors may...
This grounding test circuit was found in an American 80's documentation. The circuit is for the...