Prima oara bazele:
http://electrokits.ro/......-ro-c-4_5/
https://hobbytronica.ro/articole/electronica-pentru-incepatori/
www.elforum.info/topic/121781-carti-electronica-si-electrotehnica/
http://forum.infoelectronica.ro/viewtopic.php?f=62&t=204
https://kupdf.net/......c346d2_pdf
Si multe altele.