dave1010
(dave1010)
January 7, 2022, 8:50am
61
JaredM:
I estimate then about 32A total, 4 per emitter. Vf around 3.4V. This would suggest a circuit resistance of 20mOhm assuming each vtc5a is about 15mOhm. Not bad, but maybe could be improved some. Are springs bypassed? What FET (s) does this driver use?
According to these assumptions, 8 * 50.2 should put out about 17k otf and 48A
Thanks for the numbers. I’m trying to follow along, so I can work it out for other lights…
8400 lm over 8 LEDs is 1050 lm each
1050 lm plus a bit for losses takes 4A with a Vf of about 3.4V, according to Cree XP-G3, testing a R3 4000K 90+CRI emitter
Resistance is Volts over Current, so total resistance is 3.4V/32A = 106mOhm
VTC5A is specced at 13mOhm (Mooch measured 18.6), so 15mOhm each is reasonable
4 cells makes 60mOhm from the cells, leaving 46mOhm for the circuit.
Where have I gone wrong?
The springs aren’t bypassed with wire but there are smaller springs inside too.
I’ll take some more photos before trying to take it apart. I think the charging circuit needs to be removed to get to the springs.
JaredM
(JaredM)
January 7, 2022, 3:00pm
62
Voltage sag, not Vf is the number to use in the ohms law equation. 4.15-3.4= ~.75 @ 32A >> ~23.5 mohm
Another error is the parallel resistance of the cells. Divide not multiply. 15mohm/4 = 3.5 mohm
So very roughly, 20mohm is circuit R
JaredM
(JaredM)
January 7, 2022, 3:02pm
63
Does a magnet stick to the springs?
dave1010
(dave1010)
January 7, 2022, 6:01pm
64
JaredM:
Voltage sag, not Vf is the number to use in the ohms law equation. 4.15-3.4= ~.75 @ 32A >> ~23.5 mohm
Another error is the parallel resistance of the cells. Divide not multiply. 15mohm/4 = 3.5 mohm
So very roughly, 20mohm is circuit R
Thanks! That makes sense.
Plasmaskin
(Plasmaskin)
January 10, 2022, 10:39pm
66
This looks like an awesome light but with two separate light sources, I would expect to control them using two separate switches. Going through multiple click hoops to get what you want seems really cumbersome. The Fenix LR40R got it right in this regard.
Lumen9000
(Lumen9000)
January 11, 2022, 12:27am
67
I think anduril2 works great, without more buttons.
dave1010
(dave1010)
January 11, 2022, 7:54am
68
2 independent switches would help in some ways but hinder in others. For example going to turbo on both channels would require 2 double clicks.
The Thor Pro UI is good but there’s not a good way to jump to turbo on both channels quickly if you’re just using the LEDs.
Ideally the UI would let you have the LEDs on low or medium then quickly switch to LED+LEP on turbo for a bit, then back to just LED.
MOVE-EVO
(MOVE-EVO)
January 11, 2022, 8:23am
69
LUMINTOP has a troublesome UI, so I hope it will be a simple and effective UI.
dave1010
(dave1010)
January 11, 2022, 8:45am
70
There’s a video of the prototype’s UI in the second post, if you missed it.
I have their D1, which uses their own hold-to-turn-off UI. The driver is good but I’m not keen on the UI. I also have their tint-ramping FW4X, which I didn’t really like the UI of as it had a separate config mode to change the channels. I was concerned that they’d use the FW4X’s UI here but they haven’t.
The final version may be different though.
dave1010
(dave1010)
January 11, 2022, 8:51am
71
Here's the Thor Pro prototype's turbo output visualised against the Lumintop GT70, which has similar lumen and candela numbers but is a few times the size and weight:
Please excuse my crude drawing!
Pöbel
(Pöbel)
January 11, 2022, 10:24am
72
That is actually a very good way of illustrating beam characteristics!
fonfan
(fonfan)
January 13, 2022, 2:50pm
74
Independent channels would much better.
I don’t mind the UI - as long as I can flash my own firmware.
Is the MCU of the driver an Attiny variant?
dave1010
(dave1010)
January 14, 2022, 7:39am
76
Neal now has the light up for pre order!
sevin7
(sevin7)
January 14, 2022, 1:03pm
77
It has a screen on the bottom now which is cool but not super useful. $400 is way out of my price range, I was hoping for something close to $200 with the group buy price (still no idea what that price will be). It also says its 4x 18650. If that is the case then I’m no longer interested. 18650’s are not for me, 21700’s are the way to go.
manithree
(manithree)
January 14, 2022, 8:46pm
78
Says the guy who claims 1400km of throw:
dave1010
(dave1010)
January 16, 2022, 8:19am
79
I removed the retaining ring but the driver board won’t budge while it’s still connected to the MCPCB. The wires seem to be very short.
I’m not confident enough that I can solder it back together in 1 piece and without damaging the LEP module if I took it all apart.
Here’s a shot of under the reflector.
Interesting how it says Osram P8.
One button is too hard to remember all those modes, I would like to see two buttons that are easy to access by feel within a split second.