This circuit featuring a new quadruple operational amplifier was found in the March 1980 issue of Radio Electronics magazine. The circuit is to be powered by a symmetrical 15 V source.
This circuit is from an American 80's documentation. The transistor is general purpose,...
We found this circuit in the September 1971 issue of Radio Electronics magazine. The sensor is an...
This old configuration, using a unijunction transistor (UJT) controls a LED than blinks if an...