What scheme of the laboratory power supply would you recommend?

Question

Electronics

Hello Lord!
I decided to make myself a two-pole, two-channel laboratory power supply, if possible, I would like to have three terminals - " - ", " common " and " + ", with the ability to use both two independent power outputs separately, and with the possibility of serial connection these cascades through a common stigma.
As I understand it, this possibility should be provided for in the stabilization and current limitation circuit.
Desired characteristics:

• from 0V. up to 24V. current limit adjustment from 0A. up to 10A per channel (that is, when using extreme poles, it goes from 0V to 48V from 0A to 10A)
  
• The ability to limit the current from 0A to 10A (that is, the cascade should not produce more than a given current value, while there should be no voltage drop and an overload indication should occur)
  
• Possibility of current protection from 0A to 10A
  
• Adjustment sensitivity for current 0.05A and voltage 0.1V
  
• the circuit will have to be controlled by a micro controller, through an external DAC controlled by shift registers (somewhere 10 8-bit shift register 74HC595)
  

Other Desirable Goodies

• since the whole thing will be controlled by the MK and preferably STM32f, of course, I wanted to put a normal RGB display there, you can even touch it, but it’s not critical, this is in case of observing the current in the dynamics of selecting programs, climbing through the settings, etc.
  
• "Coarse" and "Fine" adjustments on the valcoders (valcoders with a button, pressed it and it activated, the green color of its backlight lit up, Pressed again, the blue color of its backlight lit up and it went into the fine adjustment mode, he pressed it twice again flashed red and went into activation standby mode.)
  
• most likely there will be still small arrow indicators of current and voltage on each channel, most likely such that you can regulate the next DAC (tell me which of the small ones is better to use?)
  
• T.K. we use MK, then there will probably be built-in programs, for example, maintaining current (useful for charging batteries) I have a touch button driver from a Samsung ADA04 TV for 8 touch buttons, I will probably use it
  
• maybe I’ll shove an adjustable rectangular pulse generator there (sometimes a useful thing)
  
• I would like to use RGB or a 2-color 7-segment LED display for 4 characters to indicate current and voltage, and since I did not find ready-made ones, I most likely will have to do it myself, with two common conclusions, for each of two colors (if anyone knows if there are such, or a link to the alteration)
  

Actually, throw in working proven schemes, this question was created to connect ideas in one place, then on Habré, when I assemble it, I’ll post what and how it turned out, I’ll collect it from simple to complex.
Let me explain that this is fat Lab Block. So I have something to temporarily use, and this is just a project, instead of fishing or hunting

Answer 1

> the circuit will have to be controlled by a micro controller, through an external DAC
> controlled by shift registers (240 bits for voltage and 200 bits for current per channel)
And inside it is neonka .
Now, I'll finish mowing the hay - I'll sketch out the schemes for you.
UPDATE.
So so.
You go to a flea market, buy an ancient Soviet transistor amp (some kind of "Electronics-101")
If the conders on it have dried up, it doesn't matter, the main thing is that you got a solid case and a transformer.
You solve the problem with conduits - and ± 30 volts in your pocket.
Sign up here and move on.
Everything will be - and the desired characteristics, and goodies, and adjustments "roughly" and "exactly".
You just need to get on the right track. And do not require 500 watts of rated power just for the future.

Answer 2

Making a 500-watt PSU just to make it? And then write an article?
Project for a year: meditate on weekends to make it and redo it from simple to complex.
And if you really need to do it quickly and work, without show-offs with light bulbs, microcontrollers and meanders - there are a lot of schemes for reworking computer power supplies .

Answer 3

Isn't it easier to choose a ready-made product. Fortunately, the choice of laboratory power supplies is now huge https://inelso.ru/catalog/istochniki_pitaniya/labo... And it will be reliable and of high quality!!!