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Old 04-20-2009, 10:43 PM #17
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Default Re: New Qualifound driver

Jake21, if you click on the payment tab you'll see the email address for Paypal payment.

Faona promptly thanked me via email after I made the payment. Good service!


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Old 04-21-2009, 08:33 AM #18
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Default Re: New Qualifound driver

Cant wait to see if these are good or not...
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Old 04-21-2009, 12:44 PM #19
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Default Re: New Qualifound driver

thanks MegaTesla.....i ordered few of these and they also have 0.5A--1.5A and 1A---2.5A output current adjustable board. 8-)
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Old 04-21-2009, 01:33 PM #20
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Default Re: New Qualifound driver

Quote:
Originally Posted by jake21
thanks *MegaTesla.....i ordered few of these and they also have 0.5A--1.5A and 1A---2.5A output current adjustable board. 8-)
Hey Jake...
where did you see those.... you have a link... :-?

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Old 04-21-2009, 01:50 PM #21
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Default Re: New Qualifound driver

no link....i had talked with few people there and i asked if they had higher drivers than 400ma and they sure do 8-)
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Old 04-21-2009, 09:21 PM #22
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Default Re: New Qualifound driver

Quote:
Originally Posted by Xer0
Thx jake! I copy the specs:

# Constant Current to 500mA
# TTL modulation *0-5VDC *<5kHz
# 3-12VDC Supply - Laser diode dependent
# 0V off *& *>2.5v laser on
# On-Board Potentiometer for Current adjustment
# Power supply will drive all laser diodes, RED, Infrared & Blue


2.5V TTL is kinda weird...

hey guys, sorry for my stupid question, but i dont understand this specifications too much...
i understand that current range is 50 - 400mA, but is it a boost driver, or linear driver??? as i dont exactly understand what does TTL mean..
- what should be an minimum input voltage
- what will be an output voltage?
could we use it with both red and violet LD's???
thank you
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Old 04-21-2009, 11:25 PM #23
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Default Re: New Qualifound driver

Looks like maybe a small opamp driven MOSFET design that regulates on the negative side (meaning it can't be common grounded). If so, it wouldn't be a boost driver, but rather it would need the output voltage (to the LD) to be lower than the input. By how much? I'm not sure. It's probably a design that was used for green modules, possibly adapted to run higher output voltages, or just straight from one of the "module" type of green lasers. Greenies don't need a "boost" circuit since the IR diode is usually around 2V or so, meaning a 3V source can be enough to run one of these drivers for it, but it certainly wouldn't be the same for say a red or a violet diode. It also looks like part of the pot creates a series resistance between the positive input and output, so you definitely want to make sure your LD positive and negative are isolated from the LD case or that your LD case (and heatsink) are isolated from either battery pole.

And, the TTL is just so that you can modulate the output, but it looks like it's rated to a pretty low frequency, so it wouldn't really be useful for lasershow type of applications. I'm not really sure how it works... TTL grounded being the off trigger, a modulated input voltage or something else?

Also, it has the two pads being "LD ' - ' or null" and "LD ' - '", however those pads are not common, and one is probably designed to be a feedback to the driver from a photodiode.... not sure how that works, then.
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Old 04-22-2009, 12:21 PM #24
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Default Re: New Qualifound driver

Free-Shipping MOQ is 20 pieces now!
And im talking to Faona about the shipping cost... she says it should be added just one time until a weight of 200g, and not for every piece, so we should be able to put a bunch of drivers in one package. apparently just a bug and should get fixed.
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Old 04-23-2009, 03:15 AM #25
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Default Re: New Qualifound driver

Something very similar to this has popped up at o-like. $3.75 ea including shipping when you buy 2. The pics are better, and you can read the number off the regulator.

See: http://www.laserpointerforums.com/fo...1240445131/0#0
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Old 04-23-2009, 05:51 AM #26
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Default Re: New Qualifound driver

Quote:
Originally Posted by Xer0
Thx jake! I copy the specs:

# Constant Current to 500mA
# TTL modulation *0-5VDC *<5kHz
# 3-12VDC Supply - Laser diode dependent
# 0V off *& *>2.5v laser on
# On-Board Potentiometer for Current adjustment
# Power supply will drive all laser diodes, RED, Infrared & Blue


2.5V TTL is kinda weird...

not realy 2.5 volt is just the minimum voltage needed on the blanking input to get the diode at full power
5 volt max ofcourse
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Old 04-23-2009, 09:29 AM #27
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Default Re: New Qualifound driver

Warske, these do not use a regulator. Looking at the pictures this circuit is similar to the dual op-amp constant current drivers found in most of the green laser pointers.

When I get mine I can draw the schematic if anyone is interested..
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Old 04-23-2009, 11:26 AM #28
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Default Re: New Qualifound driver

Quote:
Originally Posted by MegaTesla
...this circuit is similar to the dual op-amp constant current drivers found in most of the green laser pointers.
Thanks! Are there schematics of these that you can point me to?

Quote:
When I get mine I can draw the schematic if anyone is interested..
I would be very interested!
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Old 04-25-2009, 01:15 AM #29
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Default Re: New Qualifound driver

Quote:
Originally Posted by MegaTesla
Warske, these do not use a regulator. Looking at the pictures this circuit is similar to the dual op-amp constant current drivers found in most of the green laser pointers.

When I get mine I can draw the schematic if anyone is interested..
I'd be very interested. Please do!

and thanks.
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Old 04-25-2009, 01:42 AM #30
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Default Re: New Qualifound driver

I'd like to see a 2+ Amp board. Need more info. With all the stuff coming from Chris and his buy, these might be nice.

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Old 05-05-2009, 06:45 PM #31
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Default

Ive ordered 2 of these and got a message today saying they had been shipped and they have thrown in a third for free!

Ile be using these on the diode I have extracted from a Plasmon UDO drive with a 7.4V LiPo or 11.1V LiPo...cant wait!
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Old 05-05-2009, 07:22 PM #32
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Default

i seriosly advice you not do do that with your valuable diode...
because i have serious doubt that this driver is made for 3V to drive greens&reds so you could blow the poor thing

do it with a lpc instead!
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