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My blu-ray won't light a match!? PHR at 120mA!

  • Thread starter Deleted member 8382
  • Start date
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Deleted member 8382

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I just recived one of the blu ray builds by whatsupadrian. The laser looks awesome and everything has gone perfect, I'll post a review later.

The main problem with it is the power. Althought he said me it was set at 120mA I think it's not.

The laser isn't able to light a match, I've been trying and only some smoke at max from the match head. Also, it cuts electrical tape but really slow, nothing near most of the phr lasers I've seen. Also, it doesn't warm up at all.

It stings my skin when focused so I don't think there's any big problem with it.

I've cheked the batteries and they are giving out 7.9V right now, the lens are OK.

Is there something I am missing?

Yours,
Albert
 





chipdouglas

chipdouglas

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try it on a stand. maybe you have shakey hands. also try a different brand of matches.
 
iskor12

iskor12

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What driver are you using? If it where me, I would be using 9 to 11volts. I think that your power supply is where your problem is. Also, did you measure the voltage with a load on the battery?

CHARGE YOUR BATTERIES:):):)
 
Dr.Laser

Dr.Laser

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you can light a match with 30mW of blu-ray
as iskor12 said try recharging your batteries
 
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Archienj7

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Mine's at 125 mA, rarely ever gets warm. I'd say it's your batteries as the others posted but my input voltage is usually only 7.4 to 7.5 v so it may just be a focusing problem.
 
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Deleted member 8382

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I'm sure i'm focusing it properly. Im using UV high protected googles to use the laser, and I can perfectly see the dim dot. Anyway I've been trying even puting smoke in the room and using the beam diameter to find the focal point, but nothing. the most, it make a little smoke. I'm using a tripod to hold the laser and and matches box to hold the match. I know it seems imposible but belive me, the matches just do not ignite. I've tried two kind of them and nothing. That's why I'm getting worried about it...

The batteries are the same I used on the Dilda and the same laserbee have, the problem't can't be there. I've tested them on the multimeter, 3.98V/3.96V
 
phoenix77

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TRY adding one of LARRY DFW's HI-POWER LENSES or a JAYROB 405-G lens.......rob
 
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Archienj7

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Hmmm, you need it LPM'ed then. I'm new, probably the least qualified to give advice anyways but I try :) It very well could be the driver then, anywho I'd get it checked out thoroughly. MTL it is something small or simple, I hope for your sake. Whatsupadrian is a great builder from what I've read though.
 
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hydrogenman15

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According to the sales thread this laser is using a rckstr driver. Now for the driver to deliver full power it is required to have a power supply that has a voltage that is AT LEAST 2-2.5volts above the diodes voltage. A phr-803T normally has a voltage dropout of 6v's so you will need to have batteries that put out >8v's to get full power.

--hydro15
 
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Deleted member 8382

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@1kb0t: no :(

@phoenix: bluray is suposed to burn at 50mW or even less, even if I got a crappy lens it should be burning.

@archienj7: ye, the laser is great built, it's just that the power is somehow low! I don't got a meter, that's why I'm asking.

@hydrogenman15: on full charge the batteries are giving 8.4V, and it has droped to 7.9V now just because i wasted a lot trying to light the matches. batteries are not the problem.

Yours,
Albert
 
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hydrogenman15

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So now I know voltage isn't a problem then maybe to current accidentely went down somehow. Have you tried checking the current going from the batteries to the driver?

--hydro15
 
YGG

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Quick question, did you talk to the seller yet, I am sure he could give you good details about it, help you troubleshoot and optimize if needed.
 
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Deleted member 8382

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yep, adrian is helping me via PM too. thanks hydrogenman, I didn't thought of this. I just cheked and its not stable but it moves between 73-74mA (used a 1 ohm resistor with 5% tolerance to bridge the end button and measured voltage there)

If its getting 74mA from the batteries, how many current is it giving to the diode? I don't got any idea on how a driver works inside so I got no clue xD
 
YGG

YGG

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I have to say, being a complete noob with lasers so far it really helps that I know about circuits and how they work. You have to consider how much the driver itself draws and how much the diode draws. I'm not one to say that your laser is stable or not but sometimes the current in a circuit will fluctuate by very small amounts like yours, just the way it is. If I am wrong sorry for wasting your time with noobiness:eek:
 
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Deleted member 8382

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YGG said:
I have to say, being a complete noob with lasers so far it really helps that I know about circuits and how they work. You have to consider how much the driver itself draws and how much the diode draws. I'm not one to say that your laser is stable or not but sometimes the current in a circuit will fluctuate by very small amounts like yours, just the way it is.
Click to expand...

I've now repeted the test but placing the resistor in the other side (between the heatsink and the barrel) and the result is just a bit higher, 78mA.

Someone?
 
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