What did you mod today?

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ifratos
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Budget 14500 Li-ion charger
Ikea usb charger + 1 TP 4056

And God said, Let there be light: and there was light.( Gen.1:3)

djozz
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^Nice charger build. I wonder if a readymade li-charger is actually more expensive but it is also the fun of building it. Smile

EasyB
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Djozz, very nice pocket thrower. Is that using a 18500 cell?

Is that 5A linear driver the one discussed here?
http://budgetlightforum.com/node/68416

How do you like it?

djozz
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EasyB wrote:
Djozz, very nice pocket thrower. Is that using a 18500 cell?

Is that 5A linear driver the one discussed here?
http://budgetlightforum.com/node/68416

How do you like it?


It uses a 18350 cell, the longer reflector of the S5 makes it 4mm longer than a S2+ shorty.

Almost that driver, it is the 5 amp version, but it looks the same. I like that it is cheap, that current is regulated and that it has 4 well-spaced modes and the low is a nice low-low. I do not like the memory it has because I need my lights to behave predictable.

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I’ve tried to identify the regulator chip on Simon’s new driver, but no success. It appears to be labelled “SVA11” or something to that effect. I’ve used the QX7138 in a similar fashion, but it’s limited to 3A. You guys have any idea?

ifratos
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djozz wrote:
^Nice charger build. I wonder if a readymade li-charger is actually more expensive but it is also the fun of building it. Smile

The pleasure to mod is priceless ! Smile

And God said, Let there be light: and there was light.( Gen.1:3)

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modded two original RRT-01 to sw40 9080, w kaidomain reflector and centering ring, xp star, and lubricated control ring w Nyogel 767a for very firm resistance, then fine tuned with a bit of nano oil to get the right “feel”.

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Over the last couple of weeks I modified UI of my Emisar D4S.
Of the interesting changes I made lockout mode much more prominent.

  • after power is connected the light starts locked out rather than off
  • 3 clicks from off goes to lockout
  • 3 clicks from on goes to lockout as well
  • 3 clicks from lockout goes to off

Some time ago I requested mode memory that doesn’t last too long. Now I implemented a variant of that:

  • mode memory is reset upon lockout

TODO: autolockout after 10 minutes or so
TODO: exiting lockout starts the light (how? depends on the exact click sequence)

It’s too early to tell whether that’s comfortable. Actually I may prefer something even shorter than 3-clock, but that’s for later experimentation.

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Keep on experimenting Agro. Nothing beats a physical design that prevents unwanted activation, but a very convenient software solution is the next best thing.

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gchart wrote:
I’ve tried to identify the regulator chip on Simon’s new driver, but no success. It appears to be labelled “SVA11” or something to that effect. I’ve used the QX7138 in a similar fashion, but it’s limited to 3A. You guys have any idea?

I’d like to know too. I have a quick go at identifying it but just as you I’ve come up short.
djozz
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I can make some good pics of the driver tonight if that helps?

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djozz wrote:
I can make some good pics of the driver tonight if that helps?

That could engage more people in the hunt, please do!
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Mike C wrote:
djozz wrote:
I can make some good pics of the driver tonight if that helps?

That could engage more people in the hunt, please do!

In return for the good pics ( Silly ) can someone point to how to remove memory on this driver, maybe as simple as a pencil trick on one of the caps? (there are too many caps on this driver Tired ).
EasyB
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djozz wrote:
Mike C wrote:
djozz wrote:
I can make some good pics of the driver tonight if that helps?
That could engage more people in the hunt, please do!
In return for the good pics ( Silly ) can someone point to how to remove memory on this driver, maybe as simple as a pencil trick on one of the caps? (there are too many caps on this driver Tired ).

Can’t help with the memory removal, but have you looked at the other linear driver from Simon? It has an interesting UI that allows brightness configuration of each mode, and does not have memory.

Regarding that regulation chip, I’m curious how it works. My understanding is that the FET is dissipating the heat to regulate the current. Is that regulator chip sensing the current and driving the FET gate?

djozz
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EasyB wrote:
djozz wrote:
Mike C wrote:
djozz wrote:
I can make some good pics of the driver tonight if that helps?
That could engage more people in the hunt, please do!
In return for the good pics ( Silly ) can someone point to how to remove memory on this driver, maybe as simple as a pencil trick on one of the caps? (there are too many caps on this driver Tired ).

Can’t help with the memory removal, but have you looked at the other linear driver from Simon? It has an interesting UI that allows brightness configuration of each mode, and does not have memory.

Regarding that regulation chip, I’m curious how it works. My understanding is that the FET is dissipating the heat to regulate the current. Is that regulator chip sensing the current and driving the FET gate?


I bought 5 of these drivers with memory, I liked the simple and clear operation, while the other type came with very confusing information on the Convoy site. In the meantime that one may have proven to be better for me, but I still have 4 drivers to go… Facepalm
Agro
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djozz wrote:
Nothing beats a physical design that prevents unwanted activation, but a very convenient software solution is the next best thing.

I agree…and at the same time I don’t.
The only mechanical lockout that worked for me with complete reliability was clicky switches. Even twisties would turn on by themselves from time to time.

Clickies work reliably because of the long switch travel – and that long travel makes them bulky.
For most of my use cases the bulk is a larger issue than a more involved startup procedure.
I love Nitecore TINI host (but hate UI). It’s extremely potent for the size. The buttons are easy to find and operate single-handedly. There’s no any physical protection – and with the right UI such protection wouldn’t be needed.

The real game changer for me is the momentary mode while locked out. Many times it enables me to avoid the involved startup procedure.
That, coupled with a number of nice tweaks (memory reset, aux LEDs signalling “hey I’m unlocked”) makes me want to explore avoiding physical lock out.

So far I used to have lights in 3 states:

  • physically locked out
  • off
  • on

off would really be only a temporary state and I would most often shut the light down by cutting the power.

I’d like to experiment with soft lockout because:

  • it enables aux LEDs working as locator light (and looking cool at the same time)
  • it can be more reliable in most hosts
  • it enables more host designs (i.e. TINI- or Aurora- like)
  • it gives more possibilities for state change. Physical can do only locked-out -> (one whatever mode, typically off). Soft can have direct shortcuts to multiple modes

BTW I experimented with entering the locked out state by the means of cutting the power; quickly twisting the tube back and forth can be less involved than a 3-click. It works reliably when the main LEDs are on, even at moonlight, but not at all with AUX, even when they are bright. Actually on -> locked-out transition is the one I care more about and I’m happy to see it working.

gchart
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EasyB wrote:
Regarding that regulation chip, I’m curious how it works. My understanding is that the FET is dissipating the heat to regulate the current. Is that regulator chip sensing the current and driving the FET gate?

Yeah, I think that’s the gist of it.
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Not really mod. Today I found 3 pcbs for TA fet+1 in my box with junk and decided to solder them. Actually don’t know what to use them for ¯\_(ツ)_/¯ Suggestions?

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In a flashlight? Unno.

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

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Chatika vas Paus wrote:
Not really mod. Today I found 3 pcbs for TA fet+1 in my box with junk and decided to solder them. Actually don’t know what to use them for ¯\_(ツ)_/¯ Suggestions?

Wow! very nice and clean job! Awesome drivers

  BLF

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Lightbringer wrote:
In a flashlight? Unno.

Naw, too obvious. What else needs a driver… a car? A printer?
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gchart wrote:
Lightbringer wrote:
In a flashlight? Unno.
Naw, too obvious. What else needs a driver… a car? A printer?

Wellp, I like the pretty purple… earrings for the missus? LOL

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

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Convoy 17mm 5A lineair driver

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djozz wrote:
Convoy 17mm 5A lineair driver

With temp protection Wink remove the NTC to get rid of it.
Swapping/stacking sense resistors allows you to play with current output

  BLF

Mike C
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djozz wrote:
Convoy 17mm 5A lineair driver

Wow, those where darn good pics, thanks! Beer Sorry I can’t help you with the memory issue.

It looks like it has two Alpha & Omega AON7520 “AlphaMOS” mosfets. I might be wrong on the precise model but that symbol on them is definitely Alpha & Omega.
It would be nice to know what that SVA11 / SVAII thingy is.

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At the risk of exposing my lack of electronics knowledge: could those all be FETS? In which case, together with the two big ones, for each power setting a separate channel with FET is used (so no PWM) ?

gchart
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The two large squares in the center are the primary FETs running in parallel for redundancy / heat spreading / etc. The medium sized three legged chip is the smaller FET that Mike mentioned, usually used for signal control or power under 2 amps. The 10 legged chip is a PIC-style MCU. It’s that 5 legged (SOT23-5 footprint) that runs the FET control show. It’s got to either be a current controller/regulator or op amp. I’m still mildly new to those. I’ve searched for hours to try and identify it, but no luck yet.

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I did a lot of mods, upgrades, etc. this last weekend. One of my favorites is to this SK98 I've had sitting around for a while.

I 'helped' TA get rid of some LEDs and I used this 219C, 5000K on a 20mm DTP MCPCB to replace the XM-L.

I replaced an UltraFire 5 mode (H,M,L,Flash,SOS w/memory), 17mm FET driver in a C2 with a Convoy SST40 5A and used the old C2 driver in this 98.  Sorry, no picture of that driver but I opened up the hole on a Nanj 20mm contact board, extended the driver's cheap spring, added another (from a bad SP32A driver) as a spacer, soldered the negative outer rings and then by-passed all that resistance. It can pull 6.7A with a Molicel P26A, ouch!

I found out that an S2+, lit switch fits and works fine with the Ultrafire driver.  I don't want to burn it all out so I'm using 35Es (~5A).

And the 90+ CRI, 5000K tint is beautiful! with an 'almost' sharp-focused projection of the die.

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gchart wrote:
The medium sized three legged chip is the smaller FET that Mike mentioned

Correction: I didn’t mention the three legged chip, I only mentioned the two primary FETs (Alpha & Omega AON7520) and the SOT23-5 chip (SVA11/SVAII).
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A couple Surefire 6P mods.. (I got bored)

. 6P machined for 18650, kiriba-ru copper triple/quad hand fit to press fit pills, Lexel aux board/Mtn/Dragon board both with Dragon drivers…

Left 5Mega/Surefire Defender head, red/orange Lexel board.. Right Surefire 6P fully loaded… Fully Loaded 6 Tritium tubes… Fully Loaded Glow Tape.. Fully Loaded Dragon Secndary/Aux LED’s Low… Fully Loaded Dragon Secondary/Aux High.. Red/Orange Dragon Sec/Aux on High…

KB1428 “Live Life WOT

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