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First 405nm Build, Need Advice

Correct. The LM317 type drivers are liner and require a higher voltage than the diode requires to account for the voltage drop of the driver. Boost drivers are required if you only plan to use a single battery.

try this it's working for Me. http://hightechdealz.com/
 
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Coherent Light said:
Correct. The LM317 type drivers are liner and require a higher voltage than the diode requires to account for the voltage drop of the driver. Boost drivers are required if you only plan to use a single battery.

try this it's working for Me. HighTechDealZ - High Tech DealZ
Click to expand...

Is there any benefit using liner driver to the boost driver? I mean to me the boost driver sounds like it would always be the best option..

The site still gives me a 403 Forbidden error..i wonder if its the firewall where im working??? Oh yeah guys im at work lol..I would try accessing it through a proxy site..
 
Linear Drivers are cheaper than Boost drivers. Each has it's uses, and I use Linear drivers on my red builds, and low power 405nm & 445nm builds if I have room for the required amount of batteries.

A Boost/Buck Driver will either increase or decrease the voltage as required based on the diode and power source.
 
Ok..so a red diode that uses 3v to run cant work with a boost driver..i mean like how the 405nm driver boost the voltage to 4.5v, that would damage the red diode..
What about a flexdrive drivers? I would like to believe that they are boost drivers..so most likely they would kill a red diode?
 
You should use a Linear or a boost/buck driver for a red build. The microflex is a boost/buck driver. You can use a boost driver as long as you supply the correct voltage for the driver and diode. It's easier to just use a linear for a red IMO.
 
Last One Left said:
Ok..so a red diode that uses 3v to run cant work with a boost driver..i mean like how the 405nm driver boost the voltage to 4.5v, that would damage the red diode..
What about a flexdrive drivers? I would like to believe that they are boost drivers..so most likely they would kill a red diode?
Click to expand...

No. Flex drivers are buck/boost drivers.
They will supply the diode with the current value it is set for and adjust the voltage according to the load.
They will work with any laser diode that operates within its range.
 
Ok thanks for all the info guys..so in other words..boost drivers like flexdrive can be used for almost every build, its just that they cost more?
 
Hmmm, the microboost is a 'only boost' driver that is used for blurays (5~6v) diodes. I think flexdrive is the most 'flexible' drive so it can be used with almost any build.
 
So flexdrives dont boost? Are they like neutral? like same volt in same volt out? only the amperage changes?..
 
flexdrives = boost and buck.
4.2v source = 5v out or 2v out (whatha needed)

microboost drivers = boost only
4.2v source = >4.2v out only
 
Leodahsan said:
flexdrives = boost and buck.
4.2v source = 5v out or 2v out (whatha needed)

microboost drivers = boost only
4.2v source = >4.2v out only
Click to expand...

Really quickly then, what is the voltage Requirement on the PHR-803T (if the Amperage should be roughly 100mA, then the voltage should be...) i was thinking it was simple math on this where 100mW was going into the diode, or is there a Voltage that must be met for it to be ran at?
 
do some research before asking, it will serve you well.

The PHR-803T blu-ray diode has a Vf of 3.7v.

if you're going to use a constant current driver to drive the diode, knowing the Vf isn't really necessary.
 
Ah i see, i apologize for my lack of knowledge in particularly in the laser diode area: I'm just an electrical engineer that took a interest in this "project."

Vf=Voltage forward then this will be good to know.

Usually i look for Data sheets of some kind, however the data sheet has been elusive. I guess that there is no data sheet for it, but merrily test data. I will do some good research on the diode before i start jamming it into my design.
 
Ok guys so what kind of driver is the one i have in the first post?
Driver

Is this a boost/buck, boost or linear driver? because im planning to run it with a single 18650 battery, so im thinking if its linear, then its no good..
 
You're right. You will need a buck/boost, not a buck only.
Buck and Linear = lower output voltage than input
buck = efficient
linear = turns extra input into heat (unneficient and cheap)

'DC supply voltage 2.7"
I think it is buck boost. Suitable for your needs..
I THINK!
 
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