S
SirJakesus
Guest
Since theres no section on MBC devoted to bicycle electrical systems (tsk tsk!) I'm starting this thread here to get the greatest possible exposure.
I have almost the whole lighting system for the NEXT wired up and ready to go but I need to limit the current for my Element flashlights with Luxeon K2 LED's so they don't burn out. I'm using a Tenergy lithium polymer 14.8v battery rated at 6.8ah with overcharge and discharge PCB. Both the flashlights run on 3 AAA batteries amounting to about 4.5v, supposedly they are 4 watt led's. I know I can keep them direct driven like they are right now from 4-4.5v safely and with tons of output. I just need to know how many ohms the inline resistor needs to be OR if I use an MA controlled driver like a buckpuck how many MA should I pump through these things before they burn out. I'm liking the resistor idea a bit more because that will allow me to retain the clicky switched on the backs of the lights and use only one for daytime visibility and lower power consumption or both for nighttime running.
I know most of the people here aren't electrical geniuses but if I could be turned in the right direction it'll help keep me from burning out a light or two using the trial and error method.
This will also help if I want to upgrade to one (or two of those 900 lumen cree flashlights that seem to run off 4.5-9v.
Thanks in advance. I won't be around too much until I get my power back... still a week and counting since the ice storm kicked the carp out of this area.
I have almost the whole lighting system for the NEXT wired up and ready to go but I need to limit the current for my Element flashlights with Luxeon K2 LED's so they don't burn out. I'm using a Tenergy lithium polymer 14.8v battery rated at 6.8ah with overcharge and discharge PCB. Both the flashlights run on 3 AAA batteries amounting to about 4.5v, supposedly they are 4 watt led's. I know I can keep them direct driven like they are right now from 4-4.5v safely and with tons of output. I just need to know how many ohms the inline resistor needs to be OR if I use an MA controlled driver like a buckpuck how many MA should I pump through these things before they burn out. I'm liking the resistor idea a bit more because that will allow me to retain the clicky switched on the backs of the lights and use only one for daytime visibility and lower power consumption or both for nighttime running.
I know most of the people here aren't electrical geniuses but if I could be turned in the right direction it'll help keep me from burning out a light or two using the trial and error method.
This will also help if I want to upgrade to one (or two of those 900 lumen cree flashlights that seem to run off 4.5-9v.
Thanks in advance. I won't be around too much until I get my power back... still a week and counting since the ice storm kicked the carp out of this area.