This temperature control was found in General Electric documentation from the 90's. The circuit uses a 10k ohm NTC sensor as a sensor. The triac must be in accordance with the controlled load.
This operational clamping circuit was found in an American documentation from the 1980s. The...
This circuit produces two signals with inverted phases. One is taken for the emitter of Q1 and the...
This intercom with wires up to 30 meters separation between the stations is from the Linear...