3x Rebel 100 driver
- Thread starter Tyler2006
- Start date
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65535
Flashlight Enthusiast
Shark board from the Sandwiche shoppe.
acourvil
Enlightened
Hmmm . . . shark is a boost. I'm not sure what the Vf for the Rebels is, but I think with 3x 3.7V batteries you might overdrive them. 2 batteries would work, or you could add a 4th rebel . . . 
i dont think the shark board would work since it is a boost driver and the voltage from the batts would probably be quite similar if not equal to the LED voltage and it would go to direct drive. for the shark to work you would need to use 2 batts instead of 3. or add another battery and use a buck driver.
for 3 led's driven by 3 batts the best way i can think of is to simply go direct drive with a small resistor.
for 3 led's driven by 3 batts the best way i can think of is to simply go direct drive with a small resistor.
HEY HEY ITS HENDO
Enlightened
Bullzeyebill
Flashaholic
Don't start another thread with same title and subject matter.
Bill
I see what you are doing now, different forum, but still not appropriate. Ask a mod to move your original thread.
Bill
I see what you are doing now, different forum, but still not appropriate. Ask a mod to move your original thread.
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Here's a little theory as it might help you understand the driver choice and setup better:
each led needs approx. 3.6-3.7V to run @1000mA. so if you wire 3 of them in series you get 10.8-11.1V total.
each 18650 battery will deliver approx 3.6-3.7V under load so if you wire 3 of them in series you get 10.8-11.1V total.
There are two types of drivers, a boost driver and a buck driver:
a boost driver needs a lower battery voltage (2-3V less) than the LED voltage to operate correctly.
a buck driver needs a higher battery voltage (2-3V more) than the LED voltage to operate correctly.
Now in the setup you want, the LED voltages and battery voltages are very similar therefore no driver will work.
you need to either add an led or remove a battery and use a boost driver.
in this case you could use either a shark driver:
http://theledguy.chainreactionweb.com/product_info.php?products_id=721
or a maxflex: http://www.taskled.com/maxflex.html
OR
you could add a battery or remove an led and use a buck driver.
in this case you could use either an SOB 1000 driver: http://theledguy.chainreactionweb.com/product_info.php?products_id=1004
or an nflex driver: http://www.taskled.com/nflex.html
Hope it helps you understand better.
Happy new Year
Brozneo
Enlightened
Sway
Flashlight Enthusiast
cr123a is a 3V primary battery are you going to use primary or rechargable cells?
Later
Kelly
TigerhawkT3
Flashlight Enthusiast
A buck-boost can handle similar Vin and Vout. The problem is finding one in the voltage range he wants.
Have you considered just making it DD? It would start at about 1.2A, then gradually decrease to around 5-600mA.
65535
Flashlight Enthusiast
I am concerned that even under reasonably decent load the voltage will be around 4 volts, and the LED's will be seeing enough current to do them harm in DD.
If you are using 3 RCR123's at 3.7 volts, switch to 2 17500's or even 18500's if you can for 7.4 V in and use a shark board.
You are kind of vague as to what this is for, please list what light you are using this for.
If you are using 3 RCR123's at 3.7 volts, switch to 2 17500's or even 18500's if you can for 7.4 V in and use a shark board.
You are kind of vague as to what this is for, please list what light you are using this for.
In that case you could simply use 2x18650's ( the light was intended to use these ) and add a shark driver, the driver will run all the LED's in series @1000mA
If there is enough space you could even add a pot to the shark and hey presto you have variable output with the turn of a knob.
However i doubt that 3 led's with reflectors will fit the head and im pretty certain that the body can't absorb and emit enough heat for 3 led's to run @1000mA without getting over heated after a couple of minutes.
J.D.
Newly Enlightened
Check this thread:
http://www.candlepowerforums.com/vb/showthread.php?t=184542
CPF Member Download describes a possible solution for your problem
cheers
J.D.
http://www.candlepowerforums.com/vb/showthread.php?t=184542
CPF Member Download describes a possible solution for your problem
cheers
J.D.
Mel_PL
Newly Enlightened
You can use 3 cheap "buck" drivers fed from 3x 18650 in series. Each led will be driven separately.
-- M.
