Two sensors are used in this simple remote-control circuit, one to switch on and one to switch off the relay. The circuit is from 1986 documentation. The transformer has 12 V of secondary.
When establishing the voltage at the input of this regulator, the output voltage rises smoothly until...
This circuit is used to match a high impedance input source with a low impedance output device...
This circuit is from a 1982 documentation. Here we have an adaptation of the circuit already...