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Anytime someone asks how to make their own laser driver or how to build a laser This Link gets passed along with this image:
But I think there's a bit of a flaw with it, when the diode is placed where it is inserting the batteries backwards will short and fry the LM317, and would still most likely put voltage reverse biased into the diode, possibly damaging the diode and most likely destroying the LM317.
But if the diode is simply moved to the position shown in this modified picture I made these problems should be avoided.
Anybody else notice this problem? Of course you don't have to make your schematic look like ROGs, and ROGs schematic is just an example of this sort of driver, not the definitive layout.
But I think there's a bit of a flaw with it, when the diode is placed where it is inserting the batteries backwards will short and fry the LM317, and would still most likely put voltage reverse biased into the diode, possibly damaging the diode and most likely destroying the LM317.
But if the diode is simply moved to the position shown in this modified picture I made these problems should be avoided.
Anybody else notice this problem? Of course you don't have to make your schematic look like ROGs, and ROGs schematic is just an example of this sort of driver, not the definitive layout.