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Old 05-14-2012, 07:01 AM #17
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Default Re: 1W 445 in C6 Host

Quote:
Originally Posted by Fiddy View Post
If a efficient diode and a non efficient diode had the same Voltage at 1.6A wouldn't there be a massive change in efficiency?

Power In

Vin x Iin = Pin

1.6A x 7.4V = 11.84W



Efficiency

Power out / Power In x 100

Non efficient Diode
1.041W / 11.84W x 100 = 8.79%

Efficient Diode
1.600W / 11.84W x 100 = 13.51%

13.51/8.79 = 153.69%

So wouldn't that mean that the efficient diode is 53.69% more efficient?
Yes there is a big difference in efficiency, but I was calculating heat that is put in to the host, which is only 13.51% - 8.79% =
4.72% increase in heat output

Quote:
Originally Posted by Blord View Post
There are efficient diodes and dudes. Sometimes you ran into them. Nothing to be done about it. Just build a good laser around it and sell it for a honest price.
The diode are also hotter in use. They transfer more energy into heat than into light.

dude with a G2 lens, http://users.telenet.be/nihao/Laser/bad445nm.jpg
efficient with a G2 lens, http://users.telenet.be/nihao/Laser/2W_445.jpg
Ya, pretty much sums it up

Quote:
Originally Posted by Wolfman29 View Post
Yeah, this one is a dud... and yes, the DIODE itself gets a lot hotter a lot faster if it's a dud. You were calculating driver input, not driver output and comparing it with the diode output.
I was calculating HEAT output, with a linear driver the excess energy is converted into heat and disipated into the host, which is why I included it.

Even if you Ignore the driver,
The difference in heat is small,
assuing 4.5V and 1.6A
the difference in heat between a 1W laser and a 1.6W laser is 10% increase in heat.


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Last edited by justinjja; 05-14-2012 at 07:12 AM.
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Old 05-14-2012, 07:04 AM #18
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Default Re: 1W 445 in C6 Host

Quote:
Originally Posted by justinjja View Post
1 Min on / 1 Min off is the duty cycle


The output power doesn't play a very large role in how hot a laser will get.
An efficient diode would get say 1.6W output at 1.6A with a 3 element,

1.6A*7.4V is 12W total power
An efficient diode would have 10.4W of heat
This one has 10.9W of heat
Thats only a 5% difference
Here.

Err, 7.4V * 1.6A is not diode input.
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Old 05-19-2012, 10:13 PM #19
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Default Re: 1W 445 in C6 Host $135

Bump,
and price drop to $135 shipped to the US
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Old 05-22-2012, 12:37 AM #20
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Default Re: 1W 445 in C6 Host $125

price drop to 125
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Old 05-22-2012, 03:06 PM #21
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Default Re: 1W 445 in C6 Host $125

OK ill take it for 125. Can you ship USPS priority? Should cost around 5? How do i send payment? Paypal?
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Old 05-22-2012, 03:42 PM #22
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Default Re: 1W 445 in C6 Host $125

Payment Sent.
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