Is it good PS project? Any alternatives?

[001]

Hi!

I wanna build simple linear power supply with voltage and current modes

Is it project Ok http://www.electronics-lab.com/project/0-50v-2a-bench-power-supply/ ? Any opinions/alternatives?

Thanx

[prasimix]

This design is discussed hundred of times on this forum and elsewhere. If you need good and simple design perhaps you can try this one: LM10 Linear Power Supply 0-50V 0-2A with temperature protection.

[001]

This design is discussed hundred of times on this forum and elsewhere.

Thanx!
Where I can read this?
Any conclusion?

[Kleinstein]

The circuit from the 1st link is actually a variant of the LM10 circuit.

A rather long thread on one type of power supply is this one:
https://www.eevblog.com/forum/beginners/bangood-psu-enhancements/
It starts with a cheap kit and fixes the main issues.  With the fixes the circuit is Ok, though limited in the voltage range by the OPs used. The main point it that the kit advertised at 30 V and 3 A is good for 20 V and maybe 1.5 A, maybe 2 A.

Another type of lab power supply are build similar to the older HP ones, with a floating regulator and thus usually a 2nd transformer. This type is also used in quite a lot of the cheap commercial supplies. It's a little more tricky, but very flexible to also work to higher voltages if needed.

[001]

Another type of lab power supply are build similar to the older HP ones, with a floating regulator and thus usually a 2nd transformer. This type is also used in quite a lot of the cheap commercial supplies. It's a little more tricky, but very flexible to also work to higher voltages if needed.

What schematic do You mean?

[xavier60]

I recently had good results building a floating type regulator. I found it difficult getting used to the + output being the ground reference for the control circuitry.
I didn't copy any particular circuit, only the basic way in which most of these regulators work. One op-amp for the Voltage Control loop and one op-amp for the Current Control loop.
The output pins of the 2 op-amps are diode ORed together so that either can take control of the Gate of a large MOSFET which functions as the series pass element.
The circuitry in the red outline is only there for interfacing to a micro-controller which isn't necessary.
 In my project, the regulator is fed from a 600W SMPS. I don't recommend doing the same. A conventional mains transformer with secondary tap changing would be best.