Source google image: http://media.toolpartspro.com/image/8220%28F013822000%29/8220%28F013822000%29-Dremel-PB.png
Schema electrique dremel 4000
Source google image: http://media.toolpartspro.com/image/8220%28F013822000%29/8220%28F013822000%29-Dremel-PB.png