The far red thread

8

8/10

Well-Known Member
robincnn said:
At 600ma you should get about .6*2.2 watts. Also Far Red are not going to be as bright as regular red.
You said your driver is 4-12V so it could have an issue with single LED.
Did you test by connecting both LED together in series and powering, +ve of one LED connected to -ve of other LED. In series it should try to pull around 4.4Volts

View attachment 3564489
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Yes, I hook them up in series. I can't remember if I did that the first time, but I'm pretty sure I did...

But are you saying there should be no problem powering these leds with that driver? Cause the driver runs the cxa1304 just fine, so it seems to be good. If there is no obvious problem with this setup I'll try the two untested 730nm leds.

I might consider hooking up one of the 730nm with one cxa1304 if the sum voltage fits better within the 4-12v range. Which I think it should, though I haven't checked the Vf of the cxa1304 @ 600mA yet.

Wait... Could the issue be that the one of the two 730nm leds that doesn't respond, has connection issues, lets the current straight through itself and the resulting load is only one led, which the driver can't run properly given it is only 2.2V?

I'll try the pulsing 730nm in series with a cxa1304.

EDIT: Turns out the cxa1304 is 9.75Vf @ 600mA... Combined with the 2.2 of the 730nm it's a little too close to 12V, right?
 
robincnn

robincnn

Well-Known Member
I hope you hookup your LED before you power on that led driver. Those CC drivers will have max voltage under no load. And then if you connect your 1 or 2 mono LED then LED might burn out

9.75+2.2 is fine. Almost 12. If it were over 12 then driver would have reduced current to bring voltage near 12.
I would expect Fault LED would be open circuit and not short.
 
8

8/10

Well-Known Member
Yep, I've learned the hard way to secure all connections before powering up the circuit. I'll try the cxa+730 then.
btw, what would the driver do if the voltage was lower than 4? Raise current?

I really need to get myself a multimeter!

EDIT: cxa + "non responsive" 730nm = nothing
cxa + "pulsing" 730nm = steady light on both leds! but the 730nm is very dim. almost like
the "on" diode on a TV or other appliance.

haven't tried the new 730nm leds yet.
 
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tick tack toe

tick tack toe

Well-Known Member
Okay guys, I took a sample of my plants and now I have over thought everything and doubting myself in my "plan" :D

I've received my lights today and they are much smaller than I thought. First of all am I wiring this correctly. See what smoking does ... you should all quit now! I go from + to - correct (like in the picture)

Lights
https://www.led-tech.de/en/High-Power-LEDs-Osram/Osram-Oslon--SSL/OSRAM-Oslon-SSL-80-Far-Red-on-Star-LT-2520_206_207.html
Driver
https://www.led-tech.de/en/LED-Controlling/Constant-Current-Power-Supply/Power-Supply-for-1-3x-1W-LEDs--230V--LT-1087_118_119.html

2015-12-15 21.04.50.jpg

Next question is mounting. How much of a heat sink do they need if I am running them for about 10min a day? Would it be okay to attach them to the cob heatsink (passive with no fan - tent has good air flow)? and could I put one on the L shape Alu (middle) that is about as wide as the star?
2015-06-16 21.20.41.jpg 2015-06-12 00.00.20.jpg
Here is my current setup. What do people recommend?
 
Positivity

Positivity

Well-Known Member
@tick tack toe

Looks like 350ma..should be fine on the L shape if that gives you the best spot to hit everything evenly. I had 10w ledengin at 700ma on a long and thin strip and they are still going till this day. 3w is a better choice though, 10w is just what I had at the time. Just 3 of those stars might be enough if you want to save a few on the side. Not really sure how bright they will be and how large your space is. As long as you see some light hitting everywhere you want it to you should be good

Wiring looks good. I'd just go 5 minutes if you want to possibly extend the life of things. Actually ran 2 minutes after lights out and still got the shorter flowering time
 
tick tack toe

tick tack toe

Well-Known Member
Positivity said:
@tick tack toe

Looks like 350ma..should be fine on the L shape if that gives you the best spot to hit everything evenly. I had 10w ledengin at 700ma on a long and thin strip and they are still going till this day. 3w is a better choice though, 10w is just what I had at the time. Just 3 of those stars might be enough if you want to save a few on the side. Not really sure how bright they will be and how large your space is. As long as you see some light hitting everywhere you want it to you should be good

Wiring looks good. I'd just go 5 minutes if you want to possibly extend the life of things. Actually ran 2 minutes after lights out and still got the shorter flowering time
Click to expand...
That is great to know. It means I don't have to buy anything special apart from a new timer for the lights. I'll put the lights in tomorrow and go from there. Do you use them in veg at all?

My tent is 80 x 80cm. Using 4 CXB 3070 lights
 
Positivity

Positivity

Well-Known Member
no..been thinking about it...haven't done it yet. I need my veg room to veg slowly with tight nodes so I don't mess with the 5k too much. It does what I need it to
 
mc130p

mc130p

Well-Known Member
8/10 said:
but the 730nm is very dim. almost like the "on" diode on a TV or other appliance.
Click to expand...

With your eyes and 730nm light, a relatively high-intensity will still appear 'dim.' It is a safety risk at high power IR because your eye will not have a blink reflex (even if it did, is probably too slow with lasers). Probably dont have to worry about that with these diodes, but they won't be very bright to you ever...that's what I'm trying to get at, lol.
 
Positivity

Positivity

Well-Known Member
mc130p said:
With your eyes and 730nm light, a relatively high-intensity will still appear 'dim.' It is a safety risk at high power IR because your eye will not have a blink reflex (even if it did, is probably too slow with lasers). Probably dont have to worry about that with these diodes, but they won't be very bright to you ever...that's what I'm trying to get at, lol.
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thanks mc...all my leds scare me really..dim sum

good to know on the reflex..extra careful..
 
8

8/10

Well-Known Member
mc130p said:
With your eyes and 730nm light, a relatively high-intensity will still appear 'dim.' It is a safety risk at high power IR because your eye will not have a blink reflex (even if it did, is probably too slow with lasers). Probably dont have to worry about that with these diodes, but they won't be very bright to you ever...that's what I'm trying to get at, lol.
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wow, thanks for the heads up. I'll be careful not to stare too much at the leds.

btw, I noticed there was a lot of discussion about timers for the leds earlier in this thread and what seemed to be science of some kind going on there, so I just wanted to mention this timer I've ordered. Might do the job.

http://www.ebay.com/itm/231728005174?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT
 
8

8/10

Well-Known Member
hm, I just got the above mentioned timer in the mail and now I'm trying to figure out how much power it draws in relation to the led driver... It draws its power from the led driver so I need to know if they would work together.

The led driver puts out 4-12V @ 650mA and the timer needs 5-30V to work. If I wire three 2,2V leds to the driver, is there still room for the timer? What about the amps? Will the timer be okay with 650mA?
 
MrTwist1

MrTwist1

Well-Known Member
caretak3r said:
great find
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cheers caretak3r! Yeah it looks great and I love the fact it has a replaceable battery... in my experience that always seems to be the thing that dies first, and then it's made so difficult to replace, that it's easier to just chuck it away and buy a new one. That shit really pisses me off.

Anyhow I ordered mine yesterday so I'll let you know how it turns out.
 
G

grouch

Well-Known Member
MrTwist1 said:
I just found this dual timer and thought it looks pretty good for the purpose - I think I'm gonna order one.

http://www.monoprice.com/product?p_id=7998
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That looks great, you could power cobs, far reds, and some pc fans all from one source

Edit: just read some reviews about it and it was mentioned that if the power goes out it defaults to off when power is restored until the next time the timer turns on. This may not be an issue for far reds as they only run for a short bit. For a flowering timer it could cause issues if you can't turn it back on after a power outage. Something to keep in mind if you plan on using one
 
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