Don't forget to read the Newcomers section and the Forum Rules...
Try to do some reading before asking a question... 8 times out of 10
the answer is already posted here...:yh:
Welcome to the forum! You'll find lots of info in our faq's, stickies, and by using the search function. Also lots of DIY laser components, etc. available here. As you get lasers, please remember the need for eye protection and safe laser useage practices.