alim de pc et ventilo

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bonjour a tous j'aimerai recuperer une alim de pc pour l'utiliser pour  
alimenter un auto radio a faire marcher dans un appart ,autrement dit  
rien que le 12v m'interesse ,seulement voila il y a un connecteur en  
plus qui se branchait sur la carte mere du pc et qui controlait la  
vitesse du ventilo de l'alim et ce connecteur en l'air donne un ventilo  

l'alim pour voir s'il y a une tension ,3 fils une masse et deux fil ou  
il y a un 5v qui descend a 3.5v si le pc fonctionne et l'autre a 1.75v
mais je doute que ce soit des tensions continue ,j'imagine bien un  
signal informant l'alim que le pc est ok (alim et pc ok on fait tourner  

faire tourner ce ventilo en mode discret ,le connecteur est du type de  

merci d'avance

Re: alim de pc et ventilo

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une petite recherche sur un moteur de recherche:

http://souterweb.free.fr/boitaoutils/eclairage/annexes/ATX/modif_ATX.htm

Claude



Re: alim de pc et ventilo
Claude M :


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sympa cette page, je bookmarke
merci

Re: alim de pc et ventilo
Claude M wrote:

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m

C'est un peu dangeureux de travailler avec des alims de PC qui sont

 de sortie.

Moins dangeureux que travailler avec une batterie automobile 12V


Y a rien de mieux qu'une alim de labo pour faire une alim de labo

de fonctionnement.


Re: alim de pc et ventilo
Volkin :

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Re: alim de pc et ventilo
Alf92 wrote:
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rtie.
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Non.





 etc.
Imaginez que vous inversez le + et le - par erreur. 600 W dans







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https://fr.aliexpress.com/item/4000232206693.html?spm=a2g0o.productlist.0.0.24b07373qWQagd&s=p&algo_pvid78%505bf4-1e7e-45a2-ba4a-e9b0afb3cedd&algo_expid78%505bf4-1e7e-45a2-ba4a-e9b0afb3cedd-15&btsid=c2c7cccf-e88c-4e94-979f-c32f9312df13&ws_ab_test=searchweb0_0,searchweb201602_5,searchweb201603_53

https://fr.aliexpress.com/item/32880748855.html?spm=a2g0o.productlist.0.0.24b07373qWQagd&s=p&algo_pvid78%505bf4-1e7e-45a2-ba4a-e9b0afb3cedd&algo_expid78%505bf4-1e7e-45a2-ba4a-e9b0afb3cedd-4&btsid=c2c7cccf-e88c-4e94-979f-c32f9312df13&ws_ab_test=searchweb0_0,searchweb201602_5,searchweb201603_53





moins volumineux,  ;o)

Chab


Re: alim de pc et ventilo
Chab wrote:

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 ,3  
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nt  
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ant de sortie.
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uelques ?, y'a  

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l'audio,  

 filtrage  

'est la  

et c'est surtout  

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("P" = programmable USB/RS232), des KA3005P et des KA6003P.


Le ventilateur fait un peu de bruit mais pas plus qu'une Rigol.



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question ,comment gerer le fonctionnement du ventilo de l'alim qui  

sans controle c'est a dire a fond
c'est une alim de hp de 10 ans


Re: alim de pc et ventilo


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https://f8apf.pagesperso-orange.fr/thermo_pulse_ventilo/thermo_pulse_ventilo.htm

Re: alim de pc et ventilo
Le Thu, 2 Jan 2020 20:07:43 +0100,

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    dans le moteur. Tous les ventilateurs n'acceptent pas le PWM.
    Et ils n'acceptent pas non plus tous la commande en tension (en


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    Euh ?... Ce truc ne fonctionnera pas correctement. Le but d'un PWM
    efficace, c'est de faire commuter la tension aux bornes du


    entendre les commutations, il filtre avec une cellule avec 4R7+220u


    Sans compter que la diode 1N4001 va foutre un beau bazar dans la














    driver potable, une diode de roue libre et, surtout, on ne filtre





    JKB

--  


=> http://grincheux.de-charybde-en-scylla.fr
=> http://loubardes.de-charybde-en-scylla.fr

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propre conception.
Merci pour ces infos

Chab

Re: alim de pc et ventilo
Le Fri, 3 Jan 2020 02:10:14 +0100,


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    peu partout sur le grand ternet (et ce n'est pas le seul exemple de

    grille un transistor ou un ventilateur. Mais on trouve aussi des

    naturellement, on ne sait pas faire une alimentation correcte sans

    dangereux.

    JKB

--  


=> http://grincheux.de-charybde-en-scylla.fr
=> http://loubardes.de-charybde-en-scylla.fr

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logique basique si on a pas un DAC sous la main ;o)



https://www.cjoint.com/c/JAdcCpwa6kJ
https://www.cjoint.com/c/JAdcDvKyFoJ

Chab


Re: alim de pc et ventilo
Le Fri, 3 Jan 2020 03:36:17 +0100,



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    raisonnablement l'affaire ;-)



    JKB

--  


=> http://grincheux.de-charybde-en-scylla.fr
=> http://loubardes.de-charybde-en-scylla.fr

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Dans un autre cas javais besoin d'une progression constante et  



FPGA feraient parfaitement l'affaire  ;o)

Chab

Re: alim de pc et ventilo



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je possede un petit module ou ,en serie avec le ventilo,une ctn regule  
la vitesse du ventilo ,mais dans mon cas le module ou du moins ses  

je parlais ;je vais avec un oscillo voir ce qui se passe sur ces deux  
fils ,merci pour l'explication

Re: alim de pc et ventilo
Le Thu, 2 Jan 2020 16:54:48 +0100,


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    bricoler sa voiture en virant la masse, que ce soit le plus ou le
    moins).

    JKB

--  


=> http://grincheux.de-charybde-en-scylla.fr
=> http://loubardes.de-charybde-en-scylla.fr

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oui c'est vrai que c'est dangereux ,mais j'ai appris a me mefier du  


les gens les plus avertis

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CUT ..

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me connecter les deux mains en // sur la batterie, et je suis toujours  

indirectement comme foutre le feu, ou aller titiller alimentation un  

pas trop .
Le seul cas que j'ai connu, c'est un gars qui avait une trouille bleue  







Chab

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