We found this circuit in the October 1987 Radio Electronics magazine. The circuit uses a 1-to-1 turns ratio pulse transformer to trigger the Triac.
This is a bridge for the measurement of low value resistances and high values too. The circuit...
We found this circuit in a publication for radio amateurs of 1976. The operational amplifier is a...
This circuit, with two operationals, was obtained from an old American publication. Operational...