Source google image: http://geii.iut-troyes.univ-reims.fr/wikigeii/images/archive/9/9d/20161207103139%21Sch%C3%A9ma_%C3%A9lectrique_LEII_400.png
Schema electrique shineray
Source google image: http://geii.iut-troyes.univ-reims.fr/wikigeii/images/archive/9/9d/20161207103139%21Sch%C3%A9ma_%C3%A9lectrique_LEII_400.png