This is for my first saber, a stunt saber, and one I have been working on/making.
I use this for my character with a Jedi/Sith stunt/performance group I joined a while back.
The other night I got to do a lot of testing of the performance of the saber during a friends Wedding.
I went through 3 fully charged batteries! It kind of freaked me out.
So, I am looking into solutions for a few issues I am having.
Been doing a lot of research over the years about saber making before I start this, but some technical wording and explaining still goes over my head while learning this stuff.
Any help would be appreciated. I am looking to get this done asap.
I am looking for solutions with these issues I am having:
-battery drains super fast (I need something a bit longer time wise please)
Like a full charge to dying (only the Red showing) in under 2 hours
-the Accent LED dims when the main led is on
-heat issues (kind of solved this by using the hilt as also a heatsink)
-I maybe over driving the battery by 0.8? Nothing showing that could true other then the dimming and my battery life so far.
What I have:
This is only a Stunt Saber.
-20mm MCPCB star with 4x 3watt Cree XB-D LED dies
I got this for color mixing reasons, the emitter/dies are: Amber, Amber, Green and Red
Both the Amber, Amber and Ground has a 1 ohm 1 watt Resistor it came with
Anodized black heat sink unit 1.00 OD 1.25 Length
Narrow beam optic
-Panasonic Li-Ion NCR18650B 3.7V 3400mAh PCB Protected Rechargeable Battery
Uses a Li-Ion 18650 battery holder so the batteries can be changed out
-5mm yellow accent LED 2.2v @ 20mA (goes inside transparent 1" dia. crystal at the pommel)
I have a 75 OHMS 1/8 resistor for this
-SPST Latching switch
-24 gauge insulated stranded wire (various colors)
What I was going to add/change:
HUGE Question: does anyone know the volt/forward voltage for the XB-D LEDs? Mainly for the amber, red and green emitters/dies. I am sure gets asked a lot though, but I am having a hard time finding that info, and I can't figure it out even with the datasheet.
-I was going to change the resistor in the pommel I currently have to a 20mA DynaOhm Variable Resistor on the accent LED in the pommel
-If I can't use a buck puck with 3.7v battery I was instead thinking about using one DynaOhm Variable Resistor to each negative wire and hooking them up to the main LEd module?
Are those good ideas?
Fixes I thought about:
-I am trying avoid to larger sized batteries as I only have 1" ID for the insides
-I was looking into getting a Buckpuck (as how great they are for this) to help with the heat and power for the main LED but it requires a 5v :< (Too bad)
-Change the yellow accent LED to one with smaller volts? I my problem with this, is that I need something bright. Maybe if I add two of them?
-Using 10440 li-ion batteries with a AAA holder that holds 2 or 3 of them? Or using two 14500 li-ion batteries that can hold then in a line? Maybe two 1/2AA li-ion 1200 mAh in a AA battery holder for a 7.4 2400 mAh battery? May one 14500 3.7 battery for the main LED, and one 1/2 AA for the accent LED? (No idea how to hook up that last one.)
-I found some 18650 4200 mAh 4.2v Li-ion I could use those instead of 3.7v? (They are not just 3.7 with a full charge they are 4.2v, I think they reach like a 4.8v on full charge. However, I think the power still runs too short.)
Questions/other stuff:
If your LED module came with 1 ohm 1 watt on the amber, amber and ground, can you just use just one Variable Resistor to replace them? Can you put just one resistor on the Amber, amber, ground and green? I have only seen a DynaOhm Variable Resistor in 20mA, 25mA and 30mA so far. I am not sure if that may work for my module.
If your main LED module has resistors wired on the negative, can you wire your resistor for the accent on the positive? Should all resistors be wired that same way throughout the "circuit" or will it be okay?
The circuit opens and closes on the positive, due to less wires on that side. Is this okay, or should I have wired it differently?