This circuit for voltmeter has an output of 1 V for 100 uA having been suggested by American publication of 1969. The transistors are general purpose types.
This circuit was obtained in a 1967 General Electric manual. The circuit applies to other triacs....
Found in an October 1992 Radio Electronics magazine article, this circuit generates a low-power tone in...
This circuit was obtained from an American 80's documentation. The operational ones can be...