albasete Posted July 30, 2013 Share Posted July 30, 2013 Subiectul a fost putin discutat in alt topic, asa ca am decis sa deschid un topic separat pentru abordarea schemei urmatoare: http://vasileelettronic.altervista.org/ ... 20news.htm Pentru a inlocui operationalul existent cu OPA 277, trebuiesc facute modificari in schema ? Link to comment Share on other sites More sharing options...
Dr.L Posted July 30, 2013 Share Posted July 30, 2013 Absolut deloc Atentie insa la pini Link to comment Share on other sites More sharing options...
albasete Posted July 30, 2013 Author Share Posted July 30, 2013 Sa inteleg ca nu corespund pinii. Compar foile de catalog ale OPA-urilor. Multumesc, Dr. Led.LE. am comparat foile de catalog si am constatat ca OPA 277 are un singur operational, deci trebuiesc 2 bucati iar OPA 2277 este identic la pini cu LM 358. Link to comment Share on other sites More sharing options...
Dr.L Posted July 30, 2013 Share Posted July 30, 2013 Exact.OPA277 are si reglaj de offset, ceea ce duce la realizarea unui instrument cat se poate de precis.Ca pret, OPA2277 = 2x OPA277 Link to comment Share on other sites More sharing options...
albasete Posted July 30, 2013 Author Share Posted July 30, 2013 In concluzie trebuie o adaptare pentru PCB sau modificat PCB-ul... Link to comment Share on other sites More sharing options...
Dr.L Posted July 30, 2013 Share Posted July 30, 2013 Oricum operationalul de curent trebuie pus cat mai aproape de sunt.Nu stiam ca da si cablajul acolo Link to comment Share on other sites More sharing options...
csongore Posted August 10, 2013 Share Posted August 10, 2013 Buna eu am facut proiectul asta si functioneaza am si un cablaj pentru ea daca va intereseaza.Cel mai bine mi-a mers cu TL074 cu LM324 am avut un ofset mai mare. cablaj.pdf Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.