Hikelite
(Hikelite)
January 4, 2013, 4:36pm
24
Those 38M 7315 are of course 380mA chips. The 350mA ones are 35"x", so the first two digits are that tell you the rating.
There are empty pads, look at that board, no need for staking.
Looks like there is room for a 4th chip, the ground wire is soldered to the pad where one of the pins should be. I don't know about the clearance.
Those stars don't look like any connections to anything, just unmasked copper (gold plated), esthetics only.
MattSPL
(MattSPL)
January 4, 2013, 5:05pm
25
Here’s the driver of my Shadow SL3
Hikelite
(Hikelite)
January 4, 2013, 5:50pm
26
That's 4560mA. You have exactly 50% more current, but I doubt you have 50% more brightness compared to 3040mA.
I initially thought you soldered those extra 4 chips yourself, but did you?
MattSPL
(MattSPL)
January 4, 2013, 5:56pm
27
Hikelite:
That’s 4560mA. You have exactly 50% more current, but I doubt you have 50% more brightness compared to 3040mA.
I initially thought you soldered those extra 4 chips yourself, but did you?
No, this is how the SL3 comes. It is 4.5A as standard.
Do you think it’s possible to stack chips to increase the current?
scaru
(scaru)
January 4, 2013, 6:01pm
28
Yes, it definitely is. So all you would have to do is stack a chip on top of every current chip and you will get a 9 amp one. :)
Hikelite
(Hikelite)
January 4, 2013, 6:01pm
29
Yes it's possible to stack some more chips.
Sorry I looked only at the driver and I didn't realize you have written "Shadow SL3", I thought it was the JM26 driver.
Anyway, as I was suspecting there are 4 empty places on the JM26's driver, not 3.
dthrckt
(dthrckt)
January 4, 2013, 6:05pm
30
oh man
i might have to buy an sl3
that’s the best news i’ve heard in awhile
MattSPL
(MattSPL)
January 4, 2013, 6:15pm
31
Great news, thanks
So can I stack any number of chips in any position? Like just one chip anywhere, or an extra chip on each chip?
Cheers
Matt
Hikelite
(Hikelite)
January 4, 2013, 6:18pm
32
Any number on any position (of the 12).
likeaboss
(likeaboss)
January 4, 2013, 6:45pm
34
Wow, maybe making a 9 amp SL3 is easier than we thought. >)
gords1001
(gords1001)
January 4, 2013, 6:57pm
35
It is, but it’d be rough on the cell, can king Kong inr’s dole out 10a?
Edit, its my birthday in February, I think I’ll be ordering an sl3 and ten 380 chips or so….
dthrckt
(dthrckt)
January 4, 2013, 6:55pm
36
I think that’s more than recommended (2C?), and I wouldn’t make a habit of it w/ anything but IMR, or similar…
edit: so where’s the best price on SL3?
MattSPL
(MattSPL)
January 4, 2013, 6:55pm
37
Yeah, hopefully
Only thing is the heat sinking. The 3 leds are bonded on a single aluminium star that is glued into the head of the light, so the only area of contact with the head is around the edge of the star.
Tom_E
(Tom E)
January 4, 2013, 6:59pm
38
+1 - they are all in parallel so doesn't matter where. That's why you can even remove some, or double stack (3 high) them. But, oh boy, pushing a single 26650 over 5 amps? Not sure what the limit is on high qual batteries... I know there's been things published here on BLF about that. 6 amps would be nice, 2 amps per LED, but 6 amps on 1 battery? - only the best batteries, maybe...
Not sure, but 9-10A even on an IMR may be unrealistic -- should check this.
dthrckt
(dthrckt)
January 4, 2013, 6:56pm
39
how thick/deep is the hollow space under the star?
MattSPL
(MattSPL)
January 4, 2013, 6:59pm
40
I just ordered a couple of these Samsung INR18650-20R They can do 20A
I have a couple of mnke 26650’s that should do the trick too
likeaboss
(likeaboss)
January 4, 2013, 7:01pm
41
+1 - they are all in parallel so doesn’t matter where. That’s why you can even remove some, or double stack (3 high) them. But, oh boy, pushing a single 26650 over 5 amps? Not sure what the limit is on high qual batteries… I know there’s been things published here on BLF about that. 6 amps would be nice, 2 amps per LED, but 6 amps on 1 battery? - only the best batteries, maybe…
Supposedly King Kongs can haul more than 10 amps easily. Check out HKJ’s review here.
MattSPL
(MattSPL)
January 4, 2013, 7:01pm
42
At a guess, there is about 25mm between the star and driver, but a lot of it is taken up by the glue. I suppose it will be thermal glue of some sort though.
Hikelite
(Hikelite)
January 4, 2013, 7:02pm
43
MattSPL:
Yeah, hopefully Only thing is the heat sinking. The 3 leds are bonded on a single aluminium star that is glued into the head of the light, so the only area of contact with the head is around the edge of the star.
That big aluminum board stays on another piece of aluminum which is basically machined from one piece with the head.