The input can come from a front end ac dc converter readily available at 19v 28v and 36v.
Diy high voltage lab power supply.
However a fixed voltage fixed current power supply is sufficient for basic needs but a variable one is good to have.
When the input voltage of ic goes close to the negative supply voltage the output voltage goes high.
Power supply is an utmost essential tool for an electronic lab.
Diy variable bench power supply.
It comes in handy for powering up various applications and circuits.
Also there is that effect phase inversion.
Absolute maximum supply voltage of tl081 is 36v but ic2 may receive up to 40 42v depending of the voltage of the transformer which may destroy the chip.
Bench power supply tutorials.
Stop now if you don t understand how to do it safely.
Input high voltage ac going into a transformer which usually steps down the high voltage ac from mains to low voltage ac required for our application for designing the power supply the transformer secondary voltage is selected by considering the the output voltage of the power supply losses in the diode bridge and the linear regulator.
High voltage lab power supply this project involves work on components with potential lethal voltages and currents.
The portable dc bench power supply can produce 0a 3a at any voltage between 0v and 24v from an input voltage of 10v and 40v with the input at least 5v above the desired output voltage.