This circuit divides the voltage of a 12 V battery by 2 and can supply currents up to 1 A at the lowest voltage output. The integrated circuit used is not very common today.
This voltage calibrator circuit using a zener diode was found in Radio Electronics magazine from...
The relay of this circuit closes when the position set in P2 is reached by the sensor...
The purpose of this circuit, which we find in an old American documentation, is to allow the...