BTU Shocker Triple MT-G2 with a twist -- Aiming for >100Watt ~9000Lumens -- With external 2S power pack, handle etc...

Nice testing LH. I wonder how a small fan blowing on it would go to simulate the light being taken for a walk?

Not a bad idea, how about two? :wink:

Does BTU actually stand for “Bi-Turbo Unit”?? :bigsmile:

This light just keeps looking better and better!
I know it’s just a concept, but hot damn that’s awesome

i was pretty sure heat generated from amc was the problem. they have some sort of self protecting thing regarding temperature . when u push hard them and they cant radiate enough heat, u could have than all sorts of exotic problems in output. in one of my projects one stack with amc start to periodically change output for example. apart from this little problem everything looks cool on your project and i am enjoining the investigative part of your project with graph and so, even more.
seeing all this new projects and cool works that is being done around here, is starting to awake my sleeping appetite for projects.

usually its hard to realize how complex similar projects can be and how much work and effort they require. thank you for your effort and for sharing this.

make it liquid cooled version :wink:

I do like the potential or these new integrated water cooling solutions don’t see a way of making it work here though. Maybe someone else can build/modify a light around something like that, be cool to see.

i always ” shoooh! ” my thoughts away when a liquid cooled Light comes into my mind.

(un)fortunately i don´t have access to a lathe and a mill…

I just caught up on this after a few months…WOW!

Yeah it’s not gonna happen here, best thing I can try is something like that concept with a blower a form of duct that directs the airflow around and over as much of the limited fin area as possible. Think it could work and I have a couple of those fans on order to give it a go.

Fan noise is pretty lame though, so not sure how much use something like this would actually get, if nothing else it would at least look cool and act as an anti roll aid. Can’t have this thing flopped on it’s side or sitting on it’s face and hiding those lovely emitters when it’s sitting on the shelf now can we. :slight_smile:

DIWdivers 13.5 amp linear driver may be of interest to you. It is fully dimmable via potentiometer. There are also 10, 8, and 5 amp variants.

Very clean mod btw. I like it. :party:

Thanks, I didn’t know about that option.
Tbh I like having a standard clicky ui on a light like this (with all the nice firmware options that this hacked up 7135 driver offers), but there’s something to be said for a nice clunky multi position pot switch or dimmer combined with a driver like that. Bit more old school.

Tempted to find a use for it somewhere now. I’m also fond of the predictability of linear drivers, every time I play around with switching boost or buck drivers something usually ends up smoking…haha :wink:

Well I asked Ric about his BTU shocker stock and apart from a few battery carriers and switch boots he’s completely cleaned out. Until I asked him the BTU kit (no driver) was still on the webpage, looked like it was still in stock and available for a good price, now that’s gone too.
Looks like this is the end of the shocker. :frowning:
I did ask about another possible production run but he didn’t get back to me on that yet.

lol - don’t hold your breath.

Don’t give up mate! PM Vinh on the other forum, he has rooms of spare parts! Perhaps slight exaggeration!

Alright, hope everyone had a good break over the holidays!

Still no beamshots I’m afraid, we have half a meter of snow outside so those will have to wait a bit.

-

I’ve got some new super exciting runtime graphs though! Yay! :wink: :stuck_out_tongue:

I had a go at maximizing the heatsink stuff inside the driver cavity and then ran the same setup as the last test to see if I could see any difference in the output behaviour.
All I really did was wedge some bits of thin aluminium sheet in between the driver assembly and the cavity wall, press some TEM cubes into the middle of the 7135 slaves (just to try and homogonize the temperature within all those 7135s) and apply a bit of thermal paste where needed.

I also touched up a solder joint on one chip that looked suspect and could potentially have caused a flicker on one particular emitter. That was something slightly annoying I noticed each time the light was warming up. I probably didn’t solder one 7135 ground tab perfectly with the copper sink rings causing it to heat up faster than all the others.
Not sure yet if that has been fixed but I definitely hope so.


It’s a mess in there and I wasn’t too hopeful that it would actually do all that much but the test results are pretty significant!

( Faded graph is old comparison test done before the heatsink improvements, solid is the new test. )

Everything was set up the exact same way as the first test except that the starting temperature of the light was around 4 degrees C cooler.

So I’m very pleased with these improvements. It’s really obvious that the light is now able to maintain considerably higher output for longer, the steeper part of the output curve now starts at 4.5mins rather than at 2. Temperature on the outside of the light also gets considerably higher and continues on towards 70 degrees, at around the 5.5 minute mark I saw a larger flicker in the output and decided to call it a day at that point! Haha, made me jump a bit tbh! :stuck_out_tongue:
I suspect that was caused by one entire driver puck getting too hot and calling it quits, didn’t investigate which one because I wasn’t too happy running the light at that kind of temperature.

Next I’ll do a test with the battery pack cable again and see what real world performance looks like now.
Seeing how much better things are running now, I may well go back in and pot the entire driver assembly.

Cheers
Linus

You gotta love that temp line.

Haha there’s no stopping that bugger! If I keep tweaking I might just get it vertical! :wink:

But to be fair I’m loving the waft of nicely heated air rising up to my hand on the comfy cool handle! Only need to bring one glove out in the snow. 8)

Edit: Dammit, the flicker is still there. Number 1. driver/emitter (top center) is the culprit, my re soldering didn’t do the trick. Really hope I don’t have to take everything apart again…urgh…
I’m really starting to hate these 7135s! :frowning:

Test done with fully assembled light, (no current measurements for sake of seeing real world output performance)

…too tired to really figure out what’s going on but I’m a bit surprised. Is driver heat STILL the dominating factor dropping performance or does pack voltage now come more into play?

You can see the two output lines are perfectly parallel for a small section of the test, the cable setup a bit lower output (are we seeing the 0.6v cable losses?) but not much resembling a regulation phase before that. Just a bigger collapse in output over the first 1.5minutes.

Aha! Think I’m onto something here, environmental cooling system! Bet you wish you had this type of thing down in Aus ey MRsDNF? :wink:

Not the most portable system but very effective! 8)

The driver issues have driven him insane! J)