Found in a 1968 American documentation, this circuit uses an operational amplifier that is uncommon today. The feed must be symmetrical. The gain is 40 dB.
This circuit monitors the state of a 12 V battery and can be used directly with one, or even in a...
Other operational amplifiers series, such as MC34072, MC34074, MC35071, MC35072, MC35074 d MC33071...
This circuit generates signals that can be adjusted in a small range around the frequency of the...