Another - My own M6-R pack - This time with Li-Ion . . .

[petrev]

Hi

First off

Big Thanks . . .

. . . to JS for the original M6-R (and pointing me to where to find an LVR3I)
. . . to wqiles for his version and pictures
. . . to tvodrd for letting me have his spare Willie Hunt(JSversion)LVR3I

JS reference for LVR3I - No longer for sale - M6-R LVR3I PWM regulators
JS Original thread M6-R

Wquiles excellent version Wquiles~M6-R

Willie Hunt's specs. page Lightbulb Voltage Regulators

Other items incorporated in this build . . .

Petrev XTN36

Fivemega alternative extension FM52+

Andrewwynn modified Tail Switch Insert - AWR-TailCup
e-mail Andrew



So I had to make up a new regulated pack after I improved my PIR-Pack to death !

Here's what I wanted . . . 3s2p-17670 Li-Ion pack/carrier - Neg at the middle of one stack (1/8"brass rod links 2 pos ends to the head end) and then two stacks of 2 in parallel fill the triangle to the tail end. Second 1/8"Rod carries Batt-POS to tail (it's already there actually but I had a spare rod !) and the 2mm Rod carries NegBulb to Head-End. Battery nodes readily available for when I finally get a balanced-charger . . .)

Method . . .

Cut 3 disks from copper PCB stuff - I used a 35mm holesaw for the smaller disk and a 38mm holesaw(Bosch wood type) for the 2 bigger disks - if you cut them through a piece of pre-holed wood then you can dispense with the centre bit and thus there is no centre hole)



Drill 2 3.2mm (1/8") holes and a 2mm hole
Mark up the expected layout . . .
Bulb end on the left and all facing the same way (Head UP)



Tail UP at the right



Like sides together - Head End



Like sides together - Tail End



Try it all out for size - (Thanks to tvodrd for the great little box he sent the LVR3I in) and add some of the wires . . .



Mark out Groove lines . . .

Proximal sides together


Proximal sides together


View from the tail end


View from the head end


Cut the grooves and solder the bits on - Slip on some shrink wrap . . .
(Note moved the Neg-In connection point to the other side of the cutout at final assembly as a safer place for it to be)



More heat shrink and then solder it up



Lots of tweaking to get the right length etc. and see how the centre disk floats and there are only springs on the head end section - all cells point in the same direction except the one in the left section with the spring letting you know its the one ? ? ?

Black wrapped wire is Neg-In, Red is Pos-In and Red/Black is Bulb-Neg-Out



Join it all together . . . Cut the excess bits off and tidy it up



Add some of AW's Protected 17670s (turn it round just for a change)



Tape on the Tail-End



Tape on the Head-End



It Works ! ! !

 

[wquiles]

Cool custom pack :rock:

How well is it working? Runtimes?

Will

 

[petrev]

Cool custom pack :rock:

How well is it working? Runtimes?

Will

Hi Will

Running Great - Working Well - Still Running . . . Thanks for the inspiration too.

I'll get some Runtimes soon hopefully - Getting a full charge in the batteries now.

Cheers Pete

 

[dizzy]

Hi Pete, Great job on your M6 pack. Glad to see your keeping busy. You make this stuff look so easy. You could give some pointers to you know who.:naughty:

 

[r3d33m3r]

That is some nice work there and very functional too. I've been beating the same idea for a while now but i dont have any of that coper plated board so i have to wait for a friend to return and get me some.

Question : Why 3s2p ??? that is 11.1 V/ 3 Ah in your case. why not 2s3p and have 7.4V/ 4.5 Ah ???

Regards and props on the nice work.

P.S. ( BTW this P.S. is geting boring, isn't it? )
O.K. people i have a problem and it goes something like this: i have a lot of laptop batteries ( 8 18650 cells each i think ) oh and a lot of laptops BTW, but on the emiter department i have only two Luxeon 1W found by accident yada yada yada...... Sooooo anyone willing to trade ( will give a battery for at least 2 Seoul or CREE plus pay my side of the shiping costs 25 EURO per battery ).

 

[nethiker]

Nice Work.

Your present your project so well that I might start thinking I could do something like that someday.

Thanks for sharing.

 

[petrev]

Hi All

Thanks Dizzy - The real hard bit would be designing the electronics so I leave that to someone else.

On a positive note - great to see real progress on the AWR-HDM6 front - hope everyone gets theirs soon and then they can finally start to use the good old XTNs. Turns this piece into a sort of generic "How To" custom 3/4 rod pack starter.

That is some nice work there and very functional too. I've been beating the same idea for a while now but i dont have any of that coper plated board so i have to wait for a friend to return and get me some.

Question : Why 3s2p ??? that is 11.1 V/ 3 Ah in your case. why not 2s3p and have 7.4V/ 4.5 Ah ???

Regards and props on the nice work.

. . . .

Hi r3d33m3r and thanks.
It's 3s2p because the LVR3I likes to regulate down from 9NiMh or 3Li-Ion and the cut off/flashes are set for the appropriate per batt Voltage level.

Also bit of a moot point as Power Capacity - Watt-hours are the best basis for comparing regulated packs so about a 33Wh (1500mAh cells) capacity pack whichever way you slice it as long as you draw the same power.

Thanks nethiker
It's easy - honest . . .

Cheers
Pete

 

[cy]

NICE JOB!!!

 

[r3d33m3r]

Hi Petrev,

I am sorry but i failed to nitice what you'r driving with the bat-pack, but i was thinking LED-s.

 

[cnjl3]

Dang!
Another great post-Pete! You really make it look easy!
The only question i have is which bulb are you using?
Osram or Surefire (or both?)
I am happy you get to fire up your M6 again.

CYL

Carlos

 

[bombelman]

Awesome !

 

[petrev]

Dang!
Another great post-Pete! You really make it look easy!
The only question i have is which bulb are you using?
Osram or Surefire (or both?)
I am happy you get to fire up your M6 again.

CYL

Carlos

Hi Carlos

Both - The Osram running at 6.8V looks about the same brightness as the MN21 to me so no advantage, just an alternative. Great to have guilt free lumens back again - primaries seem to fade so fast and last so little time.
Did anyone see the ER episode recently (UK) with Abby, the rescue copter and the crashed bus ? Her M6 was on a long time ! Wonder how many packs they used in reality ? Nice to see the M6 on telly instead of the almost ubiquitous M4.

Thanks bombelman

Pete

 

[cy]

Pete, does your pack fit inside M6 without internal mod?

 

[petrev]

Pete, does your pack fit inside M6 without internal mod?

Hi Cy

No - requires both the XTN36 and an AWR-TailCup to fit a 17670 pack.

You could use the larger FM(~62) and the std. SF-TailCup and make the pack longer too with an extra end piece (ModaMag style) to add about 8mm.

A 17500 pack will just fit into an unextended M6 but only with an AWR-TailCup and no springs in the pack build.

I went for a 17670 pack with springs because I have got used to longer total runtimes and I can fit in both protected and un-protected cells (the un-protected cells are a bit shorter and need the springs to take up the slack !)

Cheers Pete

 

[bombelman]

Did I mention how nice this was ?
I would like to do this with 6x 18650 cells.

Are these LVR3I still sold and can you direct me to a specs-page ?

Regards, George.

 

[petrev]

Did I mention how nice this was ?
I would like to do this with 6x 18650 cells.

Are these LVR3I still sold and can you direct me to a specs-page ?

Regards, George.

Hi George

18650 won't fit 3x only 2x so you would need a very long extension (2xFM long extensions work) and thus get a very long M6X

JS reference for LVR3I - No longer for sale - M6-R LVR3I PWM regulators

JS Original thread M6-R

Wquiles excellent version Wquiles~M6-R

Willie Hunt's specs. page Lightbulb Voltage Regulators

Other items incorporated in this build . . .

Petrev XTN36

Fivemega alternative extension FM52+

Andrewwynn modified Tail Switch Insert - AWR-TailCup
e-mail Andrew

AndrewWynn (AWR) is probably going to have his M6HD regulated pack for sale again (once he gets the first delayed sales run caught up - lots of controversy) in a month or two ! ! !

The Petrev XTN36 extension is no longer generally available but the long Fivemega extension will work with some space filling as mentioned above.

Hope this helps

Pete

 

[petrev]

Hi Will

Had a duff battery but AW sent me a replacement Quick/Smart

Runtime for MN21 . . . 51 minutes (AW protected 17670 1600mAh)

This may still be a bit low as I think one of my remaining older 5 cells may have shut off a bit early - still, a goodly amount of runtime and just about enough for me from a bright ~2D size package with a super beam.

Cheers Pete