Re: Bestec ATX-250 12Z problems and solutions

Thank you Sam_sam_sam for this information, but initially my project was to obtain an adjustable power supply that could provide 15A (at least 10A) as with this modification of a Pc power supply on Youtube (in French unfortunately): [url]https://www.youtube[/url]. com / watch? v = w88Gn-XJZNw and [url]https://www.youtube.com/watch?v=lCBz2eTzww8[/url].
The power supply you offer can only provide 5A and the work to be done seems difficult for me, so I give up this project, but thank you anyway for your answer.Re: Bestec ATX-250...

Re: Bestec ATX-250 12Z problems and solutions

In the absence of an answer and in doubt, given my incompetence in electronics, I will therefore refrain from trying the experiment and put an end to my project by contenting myself with the constant 5 volts of my good Bestec. Hi.

Re: Bestec ATX-250 12Z problems and solutions

Everell is right, this idea is probably not the best I have had and the potential danger for use in swimming pools is too risky. However, now that my Bestec ATX-250 is open and already modified, I will continue my investigations to carefully attempt experiments on it despite PetesInCA's pessimistic forecasts. Realizing a variable voltage power supply could be useful for my assembly-discoveries in electronics. Hence my new question: to prevent the A6351 from cutting the power supply, wouldn't the simplest solution be to connect S and...

Re: Bestec ATX-250 12Z problems and solutions

Thanks for your quick reply, but I need [COLOR="Red"]15A[/COLOR] and LM317 can only supply 1.5A and even LM150 and LM138 would be insufficient (LM150 (3A) and LM138 (5A)). I still think that it must be possible to use a Bestec 250 power supply ...Re: Bestec ATX-250 12Z problems and solutions

Thanks for your quick reply, but I need [COLOR="Red"]15A[/COLOR] and LM317 can only supply 1.5A and even LM150 and LM138 would be insufficient (LM150 (3A) and LM138 (5A)). I still think that it must be possible

Re: Bestec ATX-250 12Z problems and solutions

Hello everyone
My question: is it possible to transform a [B]Bestec ATX-250 12Z[/B] to obtain an [B]adjustable voltage from 2v to 6V on the 5v rail[/B] as it is possible to do on PC power supplies using KA7500 controllers?
Using the information found in "Bestec 5v and 12v regulator circuit.pdf" and "Bestec ATX-250 12Z 5 & 12 volt regulator circuit.pdf" published by Everell, I tried to replace the R59 and R60 with a potentiometer for modifying the voltage but the protection of the A6351 puts the system...

Re: New Members - please post your introductions here

Hello everyone
I discovered this very interesting site while looking for information on PC power supplies; I am French, retired from national education (72 years old) and very handy. My last challenge is to build a salt water chlorinator for the treatment of swimming pool water; for this I need a variable voltage power supply from 2 to 6 volts capable of supplying 15A. My idea is to modify an old BESTEC brand PC power supply, but the little knowledge in electronics that I acquired by myself does not allow me to do so. This...