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 .
giorgoskok
(giorgoskok)
April 4, 2018, 11:57am
143
I would get the “real” LX1330B (Dr. Meter brand ) , but shipping + import fees is 29$ extra !
Agro
(Agro)
April 4, 2018, 12:09pm
144
Why do you say the others aren’t real.
Do you have a reason to believe they are different?
giorgoskok
(giorgoskok)
April 4, 2018, 12:30pm
145
Dr. Meter released the LX1330B , and later the other no-name LX1330B appeared . I don’t know if the internal components and it’s calibration are the same or not .
Agro
(Agro)
April 4, 2018, 12:35pm
146
The one that TLF tested and found good was actually no-name:
Hallo zusammen,
vor kurzem habe ich einen Vergleich von diversen Luxmetern duchgeführt.
Hier die Ergebnisse, Bilder und der Ablauf:
Aufbau:
Auf der Wand wurde ein Stück Karton befestigt, darauf ein Kreuz gemalt, welches genau in der Waage...
Texas_Ace
(Texas_Ace)
April 7, 2018, 3:15am
147
The first test of the XHP70.2 driver for the GT went well tonight. We just need to figure out how to bypass the carrier button top springs.
Some tweaking is needed but at least it works. More will come as I have time.
Texas_Ace:
The first test of the XHP70.2 driver for the GT went well tonight. We just need to figure out how to bypass the carrier button top springs.
Some tweaking is needed but at least it works. More will come as I have time.
Maybe awg 22-24 outside the spring will fit under the brass button , haven’t tried it .