Adaptation de niveau logique

Do you have a question? Post it now! No Registration Necessary

Translate This Thread From French to

Threaded View
Bonjour,


une carte (admettons un rPI pour simplifier les choses) dont les GPIO ne
supportent que 3.3V


adaptation de niveaux :
- Optocoupleur
- Diviseur de tension avec diode Zener
- N-Mosfet


Comme je n'ai pas besoin d'isolation, l'optocoupleur est probablement
overkill.



Quelle solution choisirez-vous et pourquoi ?

Merci,


Re: Adaptation de niveau logique

Quoted text here. Click to load it

 sur
Quoted text here. Click to load it
e




C'est suffisant, non ?


Quoted text here. Click to load it

s 24VDC)
Quoted text here. Click to load it

 les capteurs


Quoted text here. Click to load it

Quoted text here. Click to load it



Re: Adaptation de niveau logique


Quoted text here. Click to load it

Quoted text here. Click to load it




Quoted text here. Click to load it

Quoted text here. Click to load it

Oui certes, mais c'est trop simple :p











Re: Adaptation de niveau logique



Quoted text here. Click to load it

DC sur
Quoted text here. Click to load it
 ne
Quoted text here. Click to load it

Quoted text here. Click to load it

titre.
Quoted text here. Click to load it

Quoted text here. Click to load it

es N-Mosfet puisque


nces.
Quoted text here. Click to load it

 sur les

?tre

Quoted text here. Click to load it

Quoted text here. Click to load it






 la sortie.

Pour moi un pont diviseur est ce qui est de plus simple, moins cher
et moins encombrant.

Je n'ajoute un circuit actif que s'il faut passer d'un niveau bas




Re: Adaptation de niveau logique




Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it



Quoted text here. Click to load it




Le comme d'hab' est en trop.



2/ Quelle est la cible idem ?


et pas en haut (la logique est d'abord analogique) etc...

Il n'y pas plus, pas simple, que d'entrer un signal venant d'un objet  


Un bouton poussoir est parfait pour cet exercice.

--  

https://www.avast.com/antivirus


Re: Adaptation de niveau logique

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it



Quoted text here. Click to load it



Quoted text here. Click to load it


Quoted text here. Click to load it







Quoted text here. Click to load it

Quoted text here. Click to load it

?

Re: Adaptation de niveau logique




Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it



Quoted text here. Click to load it



Quoted text here. Click to load it


Quoted text here. Click to load it





Quoted text here. Click to load it

Quoted text here. Click to load it

descendre en niveau bas. Ce n'est pas neutre pour le calcul du circuit  








Quoted text here. Click to load it

Quoted text here. Click to load it
?
Quand on voit le bouton poussoir avec nos yeux et nos oreilles, on  












Les signaux capteurs peuvent arriver "avant".

--  

https://www.avast.com/antivirus


Re: Adaptation de niveau logique


Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it


Quoted text here. Click to load it

comme on peut les trouver sur les ligne de capteur.




--  
Mail .invalid  

Re: Adaptation de niveau logique


Quoted text here. Click to load it

ur  
Quoted text here. Click to load it
  
Quoted text here. Click to load it

Quoted text here. Click to load it

24VDC)  
Quoted text here. Click to load it

es capteurs  


Quoted text here. Click to load it






ino, ou il y a quelque montage dont ce calcul montage basique, si tu conna


Electroduino c?est Italien comme Arduino .....

Cela serait marrant d?avoir des chose comme le darlington, etc ....



ter ....

??

?  
Ptilou

Re: Adaptation de niveau logique


Quoted text here. Click to load it



beaucoup.

Robert  


Re: Adaptation de niveau logique



Quoted text here. Click to load it



Quoted text here. Click to load it

C'est une solution qui peut marcher si ce n'est que les LDOs n'absorbent  

p3v3 avec une source de tension sur la sortie du LDO.



Re: Adaptation de niveau logique



Quoted text here. Click to load it



Quoted text here. Click to load it


On parle bien d'un montage de ce type http://prntscr.com/wc81zs ?

Re: Adaptation de niveau logique



..

DC sur
Quoted text here. Click to load it
 ne
Quoted text here. Click to load it

vantages : 2

e de

Quoted text here. Click to load it

.
Quoted text here. Click to load it








Re: Adaptation de niveau logique





Quoted text here. Click to load it



Quoted text here. Click to load it

Quoted text here. Click to load it



Quoted text here. Click to load it






Re: Adaptation de niveau logique





o...

4VDC sur
Quoted text here. Click to load it

 Avantages : 2
Quoted text here. Click to load it
?e de

Quoted text here. Click to load it

it.
Quoted text here. Click to load it





Quoted text here. Click to load it

n ?

Pourquoi y aurait-il des surtensions ? Quelles types de surtension ?


avec une






)
et elle prend aussi plus de place.


Re: Adaptation de niveau logique




Quoted text here. Click to load it



Quoted text here. Click to load it

Quoted text here. Click to load it


  https://www.cjoint.com/c/KAckPMODQ8k

H


Site Timeline