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FrozenGate by Avery

Post your mA and mW

It could also be bad connections at this current level. I need to check it with my power supply. The cells I have are from Wicked and easily put out a couple amps. This starts in 5 seconds. I really didn't want this much current.

HMike
 





Mike,

What is your Microboost outputting? You said 1.4A input.

I have a Microboost showing up tomorrow...

Tonight the Flexdrive V5 has run good.

UPDATE:

Here is the new diode plot. The room temperature was a little cooler than earlier, and this time around I allowed the heatsink to return completely back to room temp before testing for each different mA bracket. These diodes are very temperature sensitive, as this small difference in heat has demonstrated against earlier results.

445nm Diode #1 Plot #2

400mA -- 4.1V -- 231mW (this single reading point reduced in output power slightly at lower temp)
500mA -- 4.3V -- 360mW
600mA -- 4.4V -- 467mW
700mA -- 4.5V -- 597mW
800mA -- 4.5V -- 718mW
900mA -- 4.6V -- 800mW
1.0A -- 4.6V -- 917mW
1.1A -- 4.7V -- 960mW
1.2A -- 4.8V -- >1050mW (Overflow)

Notice the difference between my first plot earlier, and when the diode is completely cooled and a few degrees lower room temp in this second plot. The voltages are all higher across the board, and the kink on my diode has moved up between 1.0A and 1.1A when earlier it was between 900mA and 1.0A. An interesting note.

Another thing I have found tonight is that the Flexdrive current output skews higher under an actual diode load. Through my 12X testing and now 445nm testing I have repeatedly experienced higher current under actual load than when under test load. Tonight my Flexdrive was set to approximately 940mA on the test load, but under actual load is putting out over 1.2A! And it has been putting out 1.2A without a hitch; no load fluttering from the Flexdrive V5 has been experienced so far tonight at over 1.2A. I am impressed with the performance of this driver and see no need to switch to a Microboost if this one has proven so reliable.
 
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Exerd, here is graph for your data:
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Now I eat crow :( Being "old school, I assume that ground carries through a power supply circuit. DrLava clearly states that the gorund (-) does not carry through on his board. I got in a hurry and connected ground wires where they were convenient and put battery ground on the diode - port. DON'T do that --

After connecting it "correctly", I have smooth control of current and no pulsing as I reported last night. I am now set at 1.1 Amps Diode current, 1.4 Amps battery input and a stable 920 mW output.

I post this for others who may overlook the diode "floating" ground and use it for power. :can: This dumbass learned to rethink connections after only 2 hours.

HMike
 
Hemlock_Mike said:
Now I eat crow :( Being "old school, I assume that ground carries through a power supply circuit. DrLava clearly states that the gorund (-) does not carry through on his board. I got in a hurry and connected ground wires where they were convenient and put battery ground on the diode - port. DON'T do that --

After connecting it "correctly", I have smooth control of current and no pulsing as I reported last night. I am now set at 1.1 Amps Diode current, 1.4 Amps battery input and a stable 920 mW output.

I post this for others who may overlook the diode "floating" ground and use it for power. :can: This dumbass learned to rethink connections after only 2 hours.

HMike
Click to expand...

So the pulsing at high currents was caused by incorrectly hooking up the powersupply? That's a relief!
 
Edited the graph with Exerds correct results. I will add my 2 to the graph tommorow.
1. 650ma - 477mw(should be ~540mw with 405g1)
aixiz 405 glass
v5 flex
2. 875ma - 730mw(should be ~830mw with 405g1!!!)
aixiz 405 glass
v5 flex
 
I need to get me another diode quick. The one I have now sure looks like a goofy thing on that graph. :thinking:

Kevin, what hosts are in your avatar?
 
I am posting my detailed data on the 2nd 445nm diode I have.

My diode is mounted in the aixiz module heat sinked with a small vice.
Lens is 405 G-1

Test equipment:
Instek PSM-2010 Programmable DC Power Supply, Vtm's to verify amps at diode and measure forward voltage. Coherent LaserCheck Power Meter.
Test procedure:
Set volts in at 5.0volts. Set current output and power up.
I took 3 readings at 10 seconds each and powered off with one minute of cool down time between each reading.

See Chart Attached.

I marked areas in question with *?
I noted mostly above the 975ma input the readings were all over the place.

My last test was a 10 minute run at 950ma input. Readings were at 30 second intervals.
|807|801|781|778|766|745|745|744|751|725|758|769|783|761|759|
|748|771|765|793|785|

I hope this information helps us all learn more about this diode.

Doug
 

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Well I finally found some time to build a 445nm Laser that I got
from EF... I installed the A130 into an Aixiz Module using a 405 G-1 lens.
It is mounted in a Z-Bolt clam shell heat sink..

I did a bit of testing and here are my results...
I tested in 100mW increments and stopped at 1300mW..
I used an Opto Power Corporation OPC-PS4005 Laser
Diode Driver.

Starts lasing @ 3.95V -- 7mW

050mW ---- 260mA
100mW ---- 310mA @ 4.09V
200mW ---- 380mA
300mW ---- 460mA
400mW ---- 540mA
500mW ---- 620mA @ 4.46V
600mW ---- 710mA
700mW ---- 800mA
800mW ---- 890mA
900mW ---- 980mA
1000mW -- 1090mA @ 4.79V
1100mW -- 1210mA
1200mW -- 1340mA
1300mW -- 1530mA @ 4.99V

For those of you that are trying to measure raw output
on a thermal sensor without a lens... your readings will
be skewed to a greater value...
The reason for this is because the 445nm LD's case gets
really hot and when you are very close to the sensor... the
head reads the LD's heat radiation on top of the Laser's
beam.. once you are a few inches away.. that effect is
negligible...


BTW... I found a 3/8" inside diameter rubber grommet that
serves as a lens ring adjustment method to not burn my
fingers.. It fits right over the knurled lens cap..
It's cheap and it works...


Jerry
 

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I don't think he offers it as a kit. I just sent him the hosts, and asked him to make em. You'd have to ask him.
Nice laser Jerry. What current are you leaving it at?
 
Thanks for posting your information Jerry...

Good idea with the finger saver...
 
Thanks guys...

At the present time is will be hooked to a variable
current driver and will be used for testing purposes
in the shop...


Jerry
 
FF-racer,

Your forward voltage is low to the point that I wonder if it is actually correct.

Also you are not cooling your sink enough in the tests, because your variance is all over the place like my first test against the second.
 
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