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FrozenGate by Avery

574nm 36 mW Yellow Laser

The fan is not attached yet as I haven't decided how I want to do it. I could just glue to to the edge of the driver board, or put the whole thing inside an enclosure and add the fan to the enclosure. But, I have had one setup to move air over the heat sinks and that was enough to keep the driver from overheating.
 
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kecked said:
The driver is running on 12V so the voltage drop on the drive transistor/FET is 12V-1.59V=10.41V So it's wasting 21W of heat continuously.
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No. There's a buck converter in play here before the linear regulator. I've asked for the buck converter output voltage to make an assessment on heat, but no one has provided that yet.
 
paul1598419 said:
The fan is not attached yet as I haven't decided how I want to do it yet. I could just glue to to the edge of the driver board, or put the whole thing inside an enclosure and add the fan to the enclosure. But, I have had one setup to move air over the heat sinks and that was enough to keep the driver from overheating.
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I have run my 565nm a bunch of times now and so far the ICs are not warm/hot to the touch, only the plastic casing gets a bit warm. No heat sinks were added yet.
 
I don't have a 565nm laser. I am only referring to the laser and drive in the OP. So far, it is the only one I have, though I have two more driver boards. The drivers don't come apart easily as there is a considerable amount of glue holding it in the plastic frame.
 
Actually my 565 runs cool. Ok on the buck. Was not sure. Still puts off a lot of heat either way
 
Wait till I receive second one. One has trouble with driver, overheating. I attached heatsink but most likely that’s not enough. Might be the case to set it up via 5V driver I have. It’s been collecting dust on a shelf.


Edit: Seller responded me that this is a 12v driver. BUT there’s a thing that this unit works fine at 7-8Volts and producing less heat. At 7volts to driver I recorded 75mw of laser power. Good result. Laser is way overspec

I’ll be doing 10minute power test with Hyperion software. Results will be here ASAP.
 
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Nexgen said:
Wait till I receive second one. One has trouble with driver, overheating. I attached heatsink but most likely that’s not enough. Might be the case to set it up via 5V driver I have. It’s been collecting dust on a shelf.


Edit: Seller responded me that this is a 12v driver. BUT there’s a thing that this unit works fine at 7-8Volts and producing less heat. At 7volts to driver I recorded 75mw of laser power. Good result. Laser is way overspec

I’ll be doing 10minute power test with Hyperion software. Results will be here ASAP.
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Are you using the uncoated TEC 20 watt LPM? If so, those numbers are likely not accurate as the sensor is not linear over the visible spectrum and you need to adjust your measurements for wavelength.
 
paul1598419 said:
Are you using the uncoated TEC 20 watt LPM? If so, those numbers are likely not accurate as the sensor is not linear over the visible spectrum and you need to adjust your measurements for wavelength.
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Yes I’m using it. How can I perform it? This LPM was last Hyperion produced.
TEC has white surface and laser light can simply reflect just like from a white wall. I know that violet and UV spectrum is absorbed better on surfaces like that. I actually thought that those deviations are calibrated, but turns out that they are not.
 
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I have the Hyperion with both sensors, plus three other LPMs. I need to take the time to make a chart using a more linear sensor showing what % of power measured is accurate per wavelength. Until I do that, the white TEC is just good for an approximation of the power it measures. Depending on the wavelength it could be off by 20% or so. I have been meaning to do this for awhile, but other projects are always getting in my way.
 
This has forced me to consider investing into a 589.
Much lovely.
 
paul1598419 said:
I have the Hyperion with both sensors, plus three other LPMs. I need to take the time to make a chart using a more linear sensor showing what % of power measured is accurate per wavelength. Until I do that, the white TEC is just good for an approximation of the power it measures. Depending on the wavelength it could be off by 20% or so. I have been meaning to do this for awhile, but other projects are always getting in my way.
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ArcticDude said:
Nice Robert!
Wanna send one for me?! :p
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Thanks! I will take in count that my measurements are +-10mw inaccurate.

Tero, you will like this lemon-yellow color, sadly your camera won’t pick it as yellow and you will have to use third-party software to color correct your pics.
 
On pl freeman posted they ar3 having problems with their lase4s loosing power over time due to bad crystals. This is why they didn’t ship yet and he’s begging we have patience while they solve it. It’s just the current batch of crystals not all of them. I noticed this myself. First time I turned mine on it was a blowtorch. Now a softe4 but nice glow. I could see the beam in direct sunlight and now not.
 
Yes, I rather be patient with them and wait for them to resolve the problem than receive a deteriorating laser. Now kecked, this might be a good time to pop the question in. What is the crystal? :whistle:
It sounds like bad coatings on the crystals. I wonder if they are facing issues of being hygroscopic? :thinking:
 
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