I just bought a package of 100 laser diodes on eBay:
My first question is: Will they need a driver? Can't I just hook two of them up in series to a 9V battery, and be done?
Secondly, I plan to attach them all to a Halloween costume and fire them all at the same time. My initial thought was that I could solder two and two in series, and then create one giant 50-in-parallel circuit of these sets of two laser diodes. Then I was hoping to run the caboodle from the aforementioned 9V battery. Is this a proper way of doing this?