If you want to customize the size or output of your benchtop power supply building your own can be a good option here are the.
Diy high voltage lab power supply.
Stop now if you don t understand how to do it safely.
When the input voltage of ic goes close to the negative supply voltage the output voltage goes high.
Also there is that effect phase inversion.
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.
Diy variable bench power supply.
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.
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.
The input can come from a front end ac dc converter readily available at 19v 28v and 36v.
Bench power supply tutorials.
It comes in handy for powering up various applications and circuits.
Variable voltage power to the people a good power supply is useful when working with electronics but it can be pricey.
However a fixed voltage fixed current power supply is sufficient for basic needs but a variable one is good to have.