Jump to content
ELFORUM - Forumul electronistilor
Guest mirku

Amplificator curent ???

Recommended Posts

Guest mirku

Salutare!Lucrez in LabView cu o placa de achizitie Ni USB-6008 (conectata pe portul USB) cu care vreau sa comand niste relee de 5V.Care este problema...curentul furnizat de placa de ahizitie (la o tensiune de 5V) este mult prea mic pentru a incarca bobina releului si a realiza comutarea acestuia!Am incercat activarea releului de la o sursa de calculator ATX pe linia de 5V si a mers fara probleme!Ce pot face (si cum...eventual un montaj simplu...un tranzistor...) sa cresc curentul furnizat de placa de achizitie pastrand tot tensiunea de 5V?...(precizez ca placa nu poate sa ofere mai mult de 50mA)Multumesc!

Link to comment
Share on other sites

Guest mirku

poti folosi tranzistoare BS170. Nu uita de dioda de pe releu, pentru protectie la supratensiuni.

Nu prea imi dau seama cum se monteaza dioda de protectie....ca in figura de mai jos??
Link to comment
Share on other sites

Guest diananaid_vie

Am facut un program in labview care arata cam asa http://cnx.org/content/m13776/latest/....schema imi merge....si partea cu daq assistant de la iesire e ok, dar nu-mi citeste bine temperatura. Am folosit un LM35DZ. Din cate am vazut ar trebui sa citeasca temperatura in timp real, iar mie nu imi citeste decat o valuare constanta(33,198....sau ceva de genul). Care ar putea fi problema?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.Terms of Use si Guidelines