This simple bridge circuit can be used for impedance or resistance measurement using a high impedance earphone as an indicator. The circuit is from an American 80's documentation.
This circuit is used to test a triac and also to teach how it works. The load is an incandescent...
I found this circuit in an ond publication from 1958. The transistors are germanium types but the...
This circuit can be powered from 4 to 12 V sources. Pin 6 is the positive supply. See more about...