The capacitor used in this circuit can have values between 5 and 30 uF. The circuit is of old documentation for radio amateurs. Observe the special source used in the supply.
This circuit was obtained in a 1991 Electronics Handbook. The publication no longer exists, but...
This circuit provides an output voltage with the absolute value of the charge and discharge current...
With the figure circuit it is possible to control the amount of heat generated by the heating...