M4D_M4X
(M4D M4X)
October 12, 2015, 11:36am
1
hey!
i started a teardown of my SD75 because i found some strange behaviour…
i have no data to show now - only some teasers…
it does not need the charging circuit to work
there is NO balancing of the cells when charging!
but a lot (thin) springs…
a lot nimb3rs taken ….
Output vs. LED Amperes vs. Input voltage/amperes
also:
its a lot colder in tint than my K60
and alot more dim on high and more bright on low
the UI is not my favorite…
to be continued…
M4D_M4X
(M4D M4X)
October 13, 2015, 7:43am
2
maybe you can also post your findings so we get a collection of inputs and ideas as a startingpoint for your projects....
i saw the Lumens was very different from one test to another - 30Qs with 4V had higher Lumens than full ones??
so i hooked up my new bench power supply and took some measures. (3rd pic in the OP)
-> i switched to low, then adjusted the input voltage down from 8,4V to 5,6V (where LVP started to flash) - after that came runs on med and high
-> i did 3 runs on high and wrote the higher values - due to heat i made pauses often - values take 15 sec after entering a testpoint
-> Lumen are corrected to my Fenix P35 TAC
-> i saw a bit higher Lumens when the light did not stuck in my box as deep as in this test setup
numb3rs!
Vin
Ain low
Aled low
Lumen low
Ain mid
Aled mid
Lumen mid
Ain high
Aled high
Lumen high
8,4
0,15
0,294
232
1,5
1,985
1446
4,2
4,76
2760
8,3
0,2
0,296
236
1,55
1,987
1447
4,3
4,8
2776
8,2
0,2
0,3
238
1,55
1,992
1450
4,3
4,82
2784
8,1
0,2
0,304
241
1,55
1,998
1452
4,4
4,82
2776
8
0,2
0,306
243
1,6
2,014
1463
4,4
4,84
2776
7,9
0,2
0,31
246
1,6
2,018
1465
4,5
4,89
2784
7,8
0,2
0,313
248
1,65
2,028
1470
4,7
4,96
2808
7,7
0,2
0,317
251
1,7
2,051
1482
4,8
5,05
2832
7,6
0,2
0,321
254
1,75
2,052
1483
5,4
5,38
2920
7,5
0,2
0,327
258
1,75
2,057
1486
5,8
5,85
3080
7,4
0,25
0,331
262
1,75
2,064
1490
5,6
5,62
3000
7,3
0,25
0,337
267
1,8
2,08
1500
5,25
5,29
2928
7,2
0,25
0,345
273
1,85
2,111
1518
4,9
4,92
2816
7,1
0,25
0,351
278
1,95
2,142
1538
4,55
4,57
2696
7
0,25
0,362
287
2
2,179
1561
4,2
4,25
2576
6,9
0,3
0,375
298
2,1
2,24
1598
3,9
3,9
2432
6,8
0,3
0,4
318
2,2
2,297
1632
3,6
3,585
2288
6,7
0,3
0,41
324
2,5
2,581
1776
3,2
3,211
2104
6,6
0,3
0,402
318
2,9
2,932
1984
2,9
2,94
1976
6,5
0,3
0,398
315
2,55
2,59
1792
2,6
2,666
1824
6,4
0,35
0,403
318
2,3
2,374
1688
2,4
2,431
1696
6,3
0,35
0,411
325
2,05
2,07
1504
2,1
2,135
1536
6,2
0,35
0,43
340
1,8
1,799
1320
1,7
1,757
1288
6,1
0,4
0,454
359
1,5
1,547
1152
1,5
1,547
1152
6
0,45
0,496
390
1,3
1,358
1024
1,2
1,263
956
5,9
0,5
0,536
423
1,05
1,105
848
1,05
1,11
848
5,8
0,8
0,826
647
0,8
0,874
680
0,8
0,874
677,6
5,7
0,6
0,631
498
0,65
0,694
552
0,7
0,709
553,6
5,6 LVP
0
0
0
0
0
0
0
0
0
the highest Lumens in every mode are right before the driver goes into DD (green Ain ~ Aled)?
edit measured 323,5 µA parasitic drain
comparison with acebeam K60:(different setup than above! full 30Qs)
K60
1
97
864
1790
3340
4608
SD75
240
1560
3290
more to come....
bugsy
(bugsy)
October 12, 2015, 1:31pm
4
When compared to the K60, it is colder in tint or colder in body because of poor heatsinking?
M4D_M4X
(M4D M4X)
October 12, 2015, 1:36pm
5
cooler in tint - the heatsinkink seems to be very good…
the base is 4 mm thick
Are you able to up the amps yet? Is the light output on par w the K60?
M4D_M4X
(M4D M4X)
October 12, 2015, 2:24pm
7
i did not mod it …. maybe soon
the lumens are on par with K60 (on its second highest mode ;))
i usually play with lights to see how they work - and this driver makes me scratch my head…
but the baby has a cold (as the whole family) and that cuts down my playtime
So the SD75 Turbo is on par with the K60 on level 5?
Hey Martin, did you bust the cap off it yet? :bigsmile: Mine was a beeeatch to get off! |(
M4D_M4X
(M4D M4X)
October 12, 2015, 4:19pm
10
cap?
you mean front bezel?
was easy…
grippy gloves - a little uuummmppfffft - and it was loose
just a bit glue in the threads
Lucky, mine was glued the whole width of the threads! |( Do you have an o-ring between bezel and head? Mine didn’t?
M4D_M4X
(M4D M4X)
October 13, 2015, 5:08am
12
i put in some data…
hope you find them interesting
edit:
any explanation why i (did selfbuilt measure led Amperes) needs near 6A to make a bit over 3200 Lumen?
low bin?
M4D_M4X
(M4D M4X)
October 13, 2015, 2:33pm
13
according to the cree characterisation tool i think its a K4 bin in that light
where do i get a P2?
kuoh
(kuoh)
October 13, 2015, 3:13pm
14
I would’t think it could with a simple battery carrier. Did the specs say it would balance charge?
KuoH
M4D_M4X
(M4D M4X)
October 13, 2015, 3:32pm
15
i don’t think it was advertised…
but isn’t it standard to balance serial cells while charging?
kuoh
(kuoh)
October 13, 2015, 3:56pm
16
It’s recommended, but requires contact points between batteries to do so. A standard battery carrier that just has a + and - contact points won’t be able to provide that, not to mention the additional charging circuitry needed.
KuoH
Curetia
(Curetia)
October 13, 2015, 6:52pm
17
Thanks for your pictures, numbers and thoughts. I hope my SD75 will arrive soon.
M4D_M4X
(M4D M4X)
October 13, 2015, 6:56pm
19
ordered a XHP70 N4 3B from Richard….
thell_gti
(thell_gti)
October 13, 2015, 6:58pm
20
I got my light and actually ordered another right away. One for modding an one for stock use.
I noticed that when going in highest mode the light is very bright but then it dims down a a bit and it sounds like pwm started.