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Just tossed $68 at the 1000mw green "DHGate Casino"






Kevlar

Kevlar

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rhd said:
Here's my thought - If it arrives, and it isn't obviously a piece of 5mw junk - IE, if it seems like there's a chance it could be even 100 mw, I'd be happy to mail it to someone on the board with a meter - provided you're in Canada too.
Click to expand...

I'd like to see it metered with an IR filter too. See how much IR is coming through.
 
A

anselm

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Interesting...
Thanks for taking the plunge! Results should be interesting...
Hoping for a review some day. :)
 
Cyparagon

Cyparagon

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They probably rated the input power rather than the output power. a pump diode at 300mW would probably use 1W including driver losses. Add the MCA conversions, and you'll get around 50, so my wild guess is 50-100mW.
 
rhd

rhd

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Drivers are that inefficient?

I knew that the transition from 808 diode to 532 output sucks up about 80% of the energy, but I didn't realize the drivers themselves already killed 70%.

So for a 200mw green, you'd need ~1W 808nm, driven by ~3W input power?

If that's the case, then we should pretty much know that a single-18650 design could never peak above 200mW in 532nm output.
 
midias

midias

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rhd said:
Drivers are that inefficient?

I knew that the transition from 808 diode to 532 output sucks up about 80% of the energy, but I didn't realize the drivers themselves already killed 70%.

So for a 200mw green, you'd need ~1W 808nm, driven by ~3W input power?

If that's the case, then we should pretty much know that a single-18650 design could never peak above 200mW in 532nm output.
Click to expand...

There are a lot of true 18650 designs over 200mw those losses are way to high
 
rhd

rhd

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I thought so too - especially the driver loss.
 
midias

midias

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Cyparagon said:
18650s are not limited to 1A.



A 300mW diode requires a lot more than 300mW of input power, sir.
Click to expand...

Just hooked up my lm317 ~400ma regulator to a meter I am outputting ~390ma and it is drawing ~394ma off the battery. The efficiency would be up to vin vs vout but the current draw in this regulator is very close.
 
rhd

rhd

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Cyparagon said:
18650s are not limited to 1A.
A 300mW diode requires a lot more than 300mW of input power, sir.
Click to expand...

Agreed, but I said 3A, not 1A.

And in fact, the original ratios that I was questioning, actually would have led to a conclusion of 4A, not 1A. That IS pushing the limits of most 18650 cells.

On your second point, again, I agree. But 3 to 4W for 200mW of output is a LOT LOT more.

Regardless, they weren't my ratios anyway, that's why I was questioning them :)
 
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