How’s it going guys
It’s been a long time since I bought any flashlights (other than a “couple” the other day) and I decided I’d mod the driver and emitter on the old TK11s lying around.
I’m waiting for some XM-L NW emitters to come in meanwhile eyeing the LD-29 drivers from Fasttech, FF and Intl-Outdoor.
They all look different… the one from fasttech starts at low while the others start at high (which is what I’m looking for).
Nonetheless, could someone help me find whereabouts on the board I could jumper a lead to lock it into high mode? (or direct-drive if needed)
The original TK11 has just a high mode from tightening the head and a low mode when untightened; I’m thinking high on tightened and high/med/low on untightened.
I can imagine a blank board between driver and b+ with a trace around the edge for b- which would bridge the l- directly (not through driver)
you would need to ground the driver inside the pill somehow and I don’t know, if the driver would be fine being shorted sorta
That seems simple enough… There’s an existing grounding spot on the pill, hoping the driver is fine with it.
This is the original driver and pill:
Would it be possible to ground it to somewhere on the board to retain the regulation? I’ll take some macro shots when I receive the drivers.
The ld-29 drivers are generally two cell, you wont be able to direct drive off two cells as the vf will be too high.
The drivers I’ve seen where a head tighten alters mode/group had a couple of ground rings, a spring and machined protrusion in the light to function - loosen ring, spring makes ground contact and 5 mode, tighten ring, protrusion makes ground contact giving 3 mode, obviously the driver and light design are meant to work together, I’ve not sern an off the shelf driver that would allow such an arrangement.
how about something like the LD-25? I’ll be using it in a 1 x 18650 TK11.
Would it at all be possible to find a point somewhere on the board to say, bypass all the modes but high?
the flashlight itself was built to toggle from high or low with the tightening of the head.
The efficiency is very good on two cells but it starts to go in medium mode at 6.5V, efficiency is 85%, about 86-87% efficiency on 1 cell down to 3.35V when it enters the low voltage warning beacon. That is the efficiency for High mode only, i bought it from IOS about 6 months ago.
Odd thing was FT states their version starts on Low whereas FF/IntO versions start at high, looking at the pictures they are different, go figure.
With any luck I’ll get the initial batch of drivers to play around with Monday
Since I totaled the second TK11 I was going to mod and got the SRK to 7.7A without more than some resistors and wire I’ll have to sell some of them later.
If anyone is interested PM me. some of the parts I’ll likely have spare are below; have a habit of getting “extras”.
Cree XM-L T6-3C 5000K White LED Emitter with 16mm Base qty3
1-2* Lithium 2-Group 3/5-Mode 2.8A LED Flashlight Driver (LD-29) qty1
8* AMC7135 4-Group 2~5 Modes LED Flashlight Driver Circuit (Generic) qty3
8* AMC7135 2-Group 2~5 Modes LED Flashlight Driver (Nanjg 105c) qty1
