Lexel
(Lexel)
March 23, 2018, 3:35am
123
Driving a XHP70 with just a 0.047 Ohm resistor will be disappointing at 6V
This would result in 5A
Also switching frequency would not be ideal, the diode would be quite close to its limit
I changed the Inductor, MOSFET, capacitors and diode with better parts for higher currents also the switching frequency will be set to a point where the drivers efficiency gets optimal
Also reducing the current sense resistor and lowering the current control voltage divider helps reducing heat
I should get next week the 20-40A synchronous Buck driver boards that I developed for CFT-90 and going to assemble and test the first prototype
Lexel
(Lexel)
March 23, 2018, 2:29pm
124
Did someone find transparent 12/14mm switch covers?
I find only green and orange in the chineese flashlight shops
The only ones I know
13.6x6.3mm https://goo.gl/V3LJqr (it goes against my principles, but the link does not work without shortening it, sorry)
14x8mm http://kaidomain.com/p/S024710.Silicone-Tailcaps-14mm-x-8mm-Transparent
.
AdrianWA
(AdrianWA)
March 24, 2018, 10:58am
126
Or buy the solarforce dummy batteries.
Hardusvd70
(Hardusvd70)
March 31, 2018, 8:38pm
127
Lfatman:
I have opened my flashlight by 2 people (my son and I) using non-skid rubber gloves.
With the stock Led obtained 925.000Cd. I have replaced it with a boiling thinner dedomed XHP35 HD and now I achieve 1.186.000Cd.
The Led I used was removed from a Haikelite MT02.
The measurements are at 10 meters. At 15 meters I get 1.118.000Cd
I got a higher reading at 15 meters when compared to a 10 meter throwing distance when I tested my GT.
Texas_Ace
(Texas_Ace)
March 31, 2018, 8:41pm
128
Yes, most get higher readings are 15-20m.
If you do not then that is usually a sign that there is too much particulate in the air, be it humidity, dirt, dust, pollen ect.
AlexGT
(AlexGT)
April 1, 2018, 2:29am
129
Lexel:
Driving a XHP70 with just a 0.047 Ohm resistor will be disappointing at 6V
This would result in 5A
Also switching frequency would not be ideal, the diode would be quite close to its limit
I changed the Inductor, MOSFET, capacitors and diode with better parts for higher currents also the switching frequency will be set to a point where the drivers efficiency gets optimal
Also reducing the current sense resistor and lowering the current control voltage divider helps reducing heat
I should get next week the 20-40A synchronous Buck driver boards that I developed for CFT-90 and going to assemble and test the first prototype
I was thinking in driving the XHP-70.2 LED at 12v not 6v, but I have decided to wait until a better driver is available…
Texas_Ace
(Texas_Ace)
April 1, 2018, 2:46am
130
Speaking of said better driver. I have the parts incoming to test the prototype XHP70.2 TA driver for the GT next week if all goes well.
AlexGT
(AlexGT)
April 1, 2018, 4:00am
131
First in line when you start selling…
Texas_Ace
(Texas_Ace)
April 1, 2018, 4:05am
132
Also getting a prototype XHP70.2 mcpcb to test as well. :sunglasses:
Really pressing for them to make these for modders.
giorgoskok
(giorgoskok)
April 1, 2018, 11:09am
133
Thanks Ta , this is awesome !
Lux reading at 7 meter throwing distance for BLF GT.
1.163Mcd which give a throwing distance of 2157 meters.
.
.
Measured at 20 meters. 1.153Mcd
.
.
Thrunite TN42.
Measured at 10 meter 701Kcd
Enderman
(Enderman)
April 4, 2018, 4:05am
135
TN42 should be doing 750-800.
I would recommend investing in a real luxmeter.
NO 750Kcd to 800Kcd is much much too high for a non mod TN42.
Where did you get that from? Highest number I’ve seen is 728… The rest hover around 700.
Enderman
(Enderman)
April 4, 2018, 5:19am
138
You’re right, my bad, it’s 700-750.
I see 720Kcd from my TN42.
Enderman
(Enderman)
April 4, 2018, 5:31am
141
Theodore41:
Any suggestions?
Read above, but the LX1330B is the best budget luxmeter.
OK,I’ve got it right now from Amazon.de .