I have been looking for literally a year and have only found one 1a driver on Ebay, and they are asking way to much. I understand that a current limiter would be pretty easy to make, and there is an "instructable" (website) on how to make one, but i don't really have the electrical engineering knowledge to understand how to make one for my needs. If anyone could help out that would be great thanks.
1000mA driver or equivelant current regulator
- Thread starter Swansen
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uk_caver
Flashlight Enthusiast
More information could be useful (input voltage range, output voltage, desired size).
(I'm assuming you couldn't just use a 3xAMC 7135 driver from dealextreme or kaidomain?)
(I'm assuming you couldn't just use a 3xAMC 7135 driver from dealextreme or kaidomain?)
i'm sorry, i honestly thought i had included more information than that. Size isn't really important and i'm sorry if i put this in the wrong place. I want to build an LED array, 20 or 50w. The constant current regulator needs to have 24VDC output(12volt output would work also, but 24v would be nicer), and 120VAC input. I've been able to find current regulators for my application available around Europe, just not anything here in the States. If the input voltage on what you suggested was higher it would work perfectly. The LEDS i'm using have a forward voltage of 2.8VDC and draw 5w each.
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uk_caver
Flashlight Enthusiast
The 7135s are only useful for powering single Leds off low-voltage DC, so ignore them
Looking around, there do seem to be some AC mains->LED drivers, but they do tend to be for lower output currents (350mA/700mA)
If you were up for homebuilding, that'd seem best to do by using something pre-bought to give you low-voltage DC (like an old external laptop power brick).
You could then either run a multi-LED DC->DC driver off it (like something from the Sandwich Shoppe, or something cheaper from KD/DX) from your DC supply, or use a very simple homebuild circuit to do linear constant current regulation.
Are you actually committed to ~12 or ~24V DC output due to the layout of the LEDs you're planning on using, or is there some flexibility there?
Looking around, there do seem to be some AC mains->LED drivers, but they do tend to be for lower output currents (350mA/700mA)
If you were up for homebuilding, that'd seem best to do by using something pre-bought to give you low-voltage DC (like an old external laptop power brick).
You could then either run a multi-LED DC->DC driver off it (like something from the Sandwich Shoppe, or something cheaper from KD/DX) from your DC supply, or use a very simple homebuild circuit to do linear constant current regulation.
Are you actually committed to ~12 or ~24V DC output due to the layout of the LEDs you're planning on using, or is there some flexibility there?
Yes, i actually have a Xitanium driver (60w?) at 3.2A, and this is the link to the circuit i was talking about earlier, or like something you are suggesting, i'm just not sure how to adapt it to my needs. http://www.instructables.com/id/Circuits-for-using-High-Power-LED_s/ But no, output voltage isn't really important i guess. My reasoning behind the 24 or 12v was because it was easiest to make strings figuring in voltage drop, but if you have better insight i'm all ears.
blasterman
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Computer power supply for the front end (AC), and then use individual DC/DC current regulators for small strings of LEDs? Just a thought.
yeah, but i still run into the same problem, which is current.
bshanahan14rulz
Flashlight Enthusiast
many computer power supplies can supply around 10-15A on the 12V rail now. Only thing is that the efficiency may not be great...
blasterman
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That's why you have a current regulator on each node / series of LEDs.
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