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- Oct 2, 2010
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Hi there
I am building a 405nm laser (PHR-803T). I want to run it off a 9V battery so I will need a driver.
I was going to build a simplified version of a DDL driver with just a LM317 and a 12 ohm 1W resistor between ADJ and VOUT pins of LM317. This would achieve around 100mA-110mA which I hear is fine if you put the module in a heatsink.
Could I just place a 9V battery + on the VIN, and - on the LD - in conjunction with the DDL driver? How many volts are sent on to the LD, or does this not matter as I know it doesn't matter as much for LEDs as they are current driven (I presume this is the same for LDs).
So my questions.
1. Will the DDL driver work fine with the 1W resistor and LM317 as I have outlined?
2. Will the driver with a 9V battery function the LD perfectly with this setup? (even though I guess life time is short).
Thanks in advance, I look forward to building this.
I am building a 405nm laser (PHR-803T). I want to run it off a 9V battery so I will need a driver.
I was going to build a simplified version of a DDL driver with just a LM317 and a 12 ohm 1W resistor between ADJ and VOUT pins of LM317. This would achieve around 100mA-110mA which I hear is fine if you put the module in a heatsink.
Could I just place a 9V battery + on the VIN, and - on the LD - in conjunction with the DDL driver? How many volts are sent on to the LD, or does this not matter as I know it doesn't matter as much for LEDs as they are current driven (I presume this is the same for LDs).
So my questions.
1. Will the DDL driver work fine with the 1W resistor and LM317 as I have outlined?
2. Will the driver with a 9V battery function the LD perfectly with this setup? (even though I guess life time is short).
Thanks in advance, I look forward to building this.