PeakTech P 6227 DC Power Supply 0-60 V / 0-6 A with 2 x USB - review and quick test 

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I am happy to see, your electronic arsenal is getting more and more advanced..

Very good review, thanks a lot! This was just what I needed to decide to buy it.

The buttons for setting the current and voltage do not look very intuitive to me ... I prefer an ON/OFF button with a clear function. But if the price is good I guess I guess you can get used to that. Can you put more of these in series/parallel to increase the total voltage/current?

Does it have current problems I mean if i want to push 20mA to smd led will it push 40mA or 50mA

Is the cooling fan of this power supply always on? Or does it stay off in case of no load or little load?

Can I use this to charge a phone at a higher amp other than 1.2 or 2 and go up to 3-4amp