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Old 11-28-2010, 03:51 PM #1
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Default AMC7135 - building a 445nm

Hi, I was searching in a lot of topics but I didn't found the answers of my questions, so I will post here a some questions:

1 - Is possible to power my 445nm diode (A140) with a 4.5v battery (amc7135 driver)?

2 - Is possible to build my flashlight in these way? ":

| Diode = AMC7135 = Switch + Battery - |

Thanks


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Old 12-06-2010, 10:57 AM #2
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Default Re: AMC7135 - building a 445nm

You probably won't be able to power it from only 4.5V.
Why don't you buy a switching driver? They are far better than linear.
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~250mW 650nm extracted from 20x DVD burner. <- dead vid 1 vid 2
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Old 12-07-2010, 01:18 PM #3
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Default Re: AMC7135 - building a 445nm

many people use the AMC7135, marcelo. But it will require heatsinking and many of them will be required to full charge (at least 3 or 4 DX AMCs)...

you will need to build this way:
| Diode = filter cap = AMC7135 = filter cap = Switch + Battery - |
you will need to ask other members about the filter capacitors.. they will protect your diode from damage.
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Old 12-07-2010, 10:33 PM #4
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Default Re: AMC7135 - building a 445nm

Quote:
Originally Posted by Leodahsan View Post
many people use the AMC7135, marcelo. But it will require heatsinking and many of them will be required to full charge (at least 3 or 4 DX AMCs)...

you will need to build this way:
| Diode = filter cap = AMC7135 = filter cap = Switch + Battery - |
you will need to ask other members about the filter capacitors.. they will protect your diode from damage.
Anything above 4.7uF will work just fine.
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Lasers:
~100mW 405nm from Erdabyz (L) akshakj <- Died once, working again. vid 1 vid 2(repaired)
~980mW 445nm in Ehgemus RPL style host, thanks to MR. DAGUIN vid
~25mW 532nm (potmoded) from DX (dead now, switch died and repair failed...)not moded vid
~50mW 532nm "star cap" style found in the bus. Yeah, lol.
~6mW 635nm diode laser pic 1 pic 2
~250mW 650nm extracted from 20x DVD burner. <- dead vid 1 vid 2
~130mW 650nm extracted from 16X DVD burner. <$15 to make! LPF thread

~100mW 780mn extracted from 52x CD burner. <- dead cremation vid

My Youtube channel
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Old 12-07-2010, 10:41 PM #5
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Default Re: AMC7135 - building a 445nm

Quote:
Originally Posted by Rafa View Post
Anything above 4.7uF will work just fine.
AND I read that lower capacitor help with the lower spikes (as 100nF or 1uF). Don't remember where, tho.
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Old 12-07-2010, 11:19 PM #6
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Default Re: AMC7135 - building a 445nm

I've read that you cannot use capacitors with the AMC7135, but I have no verification of this myself. So I wouldn't use it.
I used a 700mA AMC board to power a 445nm laser of mine. Using one lithium battery (4.2V) it does not get maximum power, but two lithium batteries is able to power the laser to 700mA.
At 4.5V, I would recommend to use only one AMC7135 (350mA) for stability reasons. Otherwise, you need a micro-flexdrive to power your laser.
Also, since the AMC driver is case positive, you need to reverse the polarity of the battery, making the laser case positive.
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Old 12-08-2010, 03:57 PM #7
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Default Re: AMC7135 - building a 445nm

http://www.addmtek.com/products/pdf/DD031-AMC7135_D.pdf

Also, did the chips get hot with 2 Li-Ion cells in series? I guess the harder you drive the 445nm diode, the less heat you should get dissipated on the chips.
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Old 12-10-2010, 02:27 AM #8
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Default Re: AMC7135 - building a 445nm

I actually never tested the heat dissipation of the driver. It is thermally connected to the heatsink through a silicone pad, but then again I never tested the thermal conductivity of that either. The good news though is that I haven't had any problems with the laser yet, so I doubt that I am overheating the AMC chips.
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8??nm: 1050mA DIY Micro Sized
658nm: 2mW keychain pointer - DIY 80mA/350mA switchable in Altoids tin - 300mA DIY Micro Sized
632.8nm: 10mW Hughes HeNe - 15mW Melles Griot HeNe - 1mW Melles Griot bare tube
612nm: 5mW Meredith Instruments HeNe
594.1nm: 4mW Meredith Instruments HeNe
543nm: 2mW Melles Griot HeNe - <1mW Multimode 6" HeNe (He's cute!)
532nm: 5mW Lyra-G5 - 70mW DIY by Wannaburn
473nm: 5mW Lab Style
445nm: DIY 650mA in Sonar II Host
405nm: DIY LG 10X at 330mA with Ehgemus host and Microboost - CNI GLP-405 70mW
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Old 12-10-2010, 02:34 AM #9
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Default Re: AMC7135 - building a 445nm

I tried to power my 445nm with the AMC7135 and has everything alright (4,5v) but the amc7135 has too hot! I'll use a heatsink, thanks.
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