sherwind2010
Newly Enlightened
- Joined
- May 11, 2015
- Messages
- 30
"double post"
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Maybe if you are lucky, they are not real Cree XPG, because real ones are 3.25V typical at 1.5A
Why not just order one that started out with Cree XPG or similar?
Depends on the current draw and the wiring and battery source if you have a powerful enough voltage source and thick enough wire the voltage shouldn't sag much at all but if the wiring is not big enough there will be a voltage drop that could be noticeable and if the drop is too much the wiring may actually start heating up. At high enough current levels I would suggest a fuse or circuit breaker inline to protect against accidents. Also of you are going to run it with the motor on the voltage output will vary perhaps at high as 14.5vI added 8 together & I needed to bump up voltage to 12.6v from 12.4v to get the rated amps. hmm... if i add more together it may be able to run at 14v...
I've never heard of a 9W resistor but you probably could get a 10W one around that range and you need to put them in parallel instead of series.I may just go with 3, 3, 3!! 3x 3Ω 3W Resistors in series to make a 1Ω 9W Resistor for each bank of 8 LED's. Couldn't find a 1Ω 9W Resistor.
I've never heard of a 9W resistor but you probably could get a 10W one around that range and you need to put them in parallel instead of series.
Thought it was just a Voltage range, Like a motor says 12v but you can push it to 14.4v? I'll run test soon.
It works guys, but it is so hard. I shouldn't of started. I guess that's why you don't see LED swaps anywhere.
these LED's will take more amps then rated after a voltage point,
Connected directly to a PSU or Battery beyond this voltage point will fry it!
The only way that this might work is by having a resistor in line with the leds & a DC/DC Converter to maintain voltage.
Sad to say this project is going on the back burner LOL!! Just tell I can figure out this circuitry stuff.
Constant Current Regulator... CCR!! I can make it dime or Max brightness too with a CCR? Thanks DIWdiver
CCR "Bad Moon Rising"
Classic! Not that it's relevant, but I enjoyed the video anyway!
Depends on the particular device you get. Some have preset current levels, some have small to moderate adjustment range, some are zero-to-max.
Lately, some units have been showing up on the cheapie sites and eBay that look pretty good for LEDs in cars. They have both voltage and current regulation, so you can set them up regulate current up to a max voltage, or to regulate voltage up to a max current. They switch seamlessly from one mode to the other as the load changes. For LED use, I'd just set the voltage to max and use the current limit. They commonly have "CVCC" or "CV/CC" in the description, and typically have zero-to-max current adjustment. I haven't seen any reviews on them yet, but on paper they look good.
Yes, those are cheap, but none of them are constant current!
There is this one here, But it cost way more. $4.50/ea for 5pcs.
I have used lm 2596 based cv cc adjustable boards as led drivers, voltage regulators and chargers, quite a few times. they work great as long as you do not go over their limits, that is actually quite surprising for $4 circuit.They commonly have "CVCC" or "CV/CC" in the description, and typically have zero-to-max current adjustment. I haven't seen any reviews on them yet, but on paper they look good.
I have used lm 2596 based cv cc adjustable boards as led drivers, voltage regulators and chargers, quite a few times. they work great as long as you do not go over their limits, that is actually quite surprising for $4 circuit.
Yes, those are cheap, but none of them are constant current!