Chief_Wiggum
Enlightened
****Update 8/03/2003****
Well, I tested three of these kids in my 3 D Maglite this morning. To my great relief, they actually fit and powered my MR16! They fit, but just barely. The Maglite endcap screws all the way down and seats properly, but it's a tight fit. Just thought I'd give you all an update.
****Update 8/02/2003****
I have a batch of adapters ready to go out Monday! Please see my thread in b/s/t for details . Thanks for your patience.
****Update 8/01/2003****
Good new, folks. I received the copper contacts today, and should have about 20 series adapters ready to go sometime next week.
I'm currently in battery adapter hell /ubbthreads/images/graemlins/banghead.gif These little guys are really a pain to put together. Anyway, I'll post some pictures of the final assembly later today. Hopefully, I'll start a b/s/t thread early next week. Sorry for the long delays, but thanks for your patience.
As promised. Teasers /ubbthreads/images/graemlins/grin.gif
Better pics to follow when I have more time.
****Update 7/17/2003****
I received the ABS endcaps today. The shop couldn't get any black, so white they are. The good news is that all the pieces fit together perfectly with no epoxy /ubbthreads/images/graemlins/smile.gif That was a big relief for me /ubbthreads/images/graemlins/buttrock.gif Here're some pics so you know what to expect. I don't yet have the copper end contacts, but am hoping to have them shortly. I'll update this thread when I have pics of a completed assembly.
Hi all,
I've been looking for a 4AA to D adapter to complete a MR16 in Mag mod, but haven't had any luck. After finding LEDmodMan's post and 12AA battery holder I was inspired.
I've spent the last couple days toying with a measuring, pricing, and toying with a CAD program. Here's what I've come up with.
This adapter will be a 1-1 replacent for (1) D cell battery. It will hold (4) standard size AA cells. I've assumed an external diameter of 0.553" for the AA and 1.30" for the D. The total height of the adapter will be the standard height of a D cell battery, currently assumed to be 2.415".
The top and bottom pieces will be constructed of CNC machined black ABS and the connecting support columns will be made of fiberglass rods 3/16" thick. The center support will be of hollow Acetal Delrin to facilitate the routing of the jumper wire for series wiring.
"inside" view
"outside" view
At each end of the "cell" will be 2 1" diameter copper disks .016" thick. These will comprise the +/- terminals for the adapter. (Not pictured)
The AA contacts will be made from available parts:
These are actually AAA contacts. The AAs were too big.
Specs are:
Terminals will be wired and soldered, either parallel or series connections, your choice.
Construction joining will be with epoxy.
The jumper wires will be run from the battery contacts through the holes into the depression in the "outside" for soldering. The depression will then be covered by the epoxied on copper contact.
This is just a feeler thread, so no orders yet. If I can generate enough interest for 50 adapters, price will be $13.00 each + shipping. More adapter may or may not reduce the price significantly.
Please post here if you're interested, and how many adapters you'd be interested in purchasing. This is not a commitment to buy, nor is it a commitment for me to manufacture.
I'm willing to front the >$500.00 this project would cost, but if you commit to buy later, please buy!
Last thing, I'm not really happy with the battery contacts, but they're all I could find. If anyone knows where I might find some round AA contacts of small diameter, please let me know! These will work, but the + terminal is only .125" in diamter. This is about the size of some of my NiMH + terminals, but smaller than some alkalines I've measured.
If anyone has any suggestions for improvements or questions please post!
Thanks for looking.
Well, I tested three of these kids in my 3 D Maglite this morning. To my great relief, they actually fit and powered my MR16! They fit, but just barely. The Maglite endcap screws all the way down and seats properly, but it's a tight fit. Just thought I'd give you all an update.
****Update 8/02/2003****
I have a batch of adapters ready to go out Monday! Please see my thread in b/s/t for details . Thanks for your patience.
****Update 8/01/2003****
Good new, folks. I received the copper contacts today, and should have about 20 series adapters ready to go sometime next week.
I'm currently in battery adapter hell /ubbthreads/images/graemlins/banghead.gif These little guys are really a pain to put together. Anyway, I'll post some pictures of the final assembly later today. Hopefully, I'll start a b/s/t thread early next week. Sorry for the long delays, but thanks for your patience.
As promised. Teasers /ubbthreads/images/graemlins/grin.gif
Better pics to follow when I have more time.
****Update 7/17/2003****
I received the ABS endcaps today. The shop couldn't get any black, so white they are. The good news is that all the pieces fit together perfectly with no epoxy /ubbthreads/images/graemlins/smile.gif That was a big relief for me /ubbthreads/images/graemlins/buttrock.gif Here're some pics so you know what to expect. I don't yet have the copper end contacts, but am hoping to have them shortly. I'll update this thread when I have pics of a completed assembly.
Hi all,
I've been looking for a 4AA to D adapter to complete a MR16 in Mag mod, but haven't had any luck. After finding LEDmodMan's post and 12AA battery holder I was inspired.
I've spent the last couple days toying with a measuring, pricing, and toying with a CAD program. Here's what I've come up with.
This adapter will be a 1-1 replacent for (1) D cell battery. It will hold (4) standard size AA cells. I've assumed an external diameter of 0.553" for the AA and 1.30" for the D. The total height of the adapter will be the standard height of a D cell battery, currently assumed to be 2.415".
The top and bottom pieces will be constructed of CNC machined black ABS and the connecting support columns will be made of fiberglass rods 3/16" thick. The center support will be of hollow Acetal Delrin to facilitate the routing of the jumper wire for series wiring.
"inside" view
"outside" view
At each end of the "cell" will be 2 1" diameter copper disks .016" thick. These will comprise the +/- terminals for the adapter. (Not pictured)
The AA contacts will be made from available parts:
These are actually AAA contacts. The AAs were too big.
Specs are:
Terminals will be wired and soldered, either parallel or series connections, your choice.
Construction joining will be with epoxy.
The jumper wires will be run from the battery contacts through the holes into the depression in the "outside" for soldering. The depression will then be covered by the epoxied on copper contact.
This is just a feeler thread, so no orders yet. If I can generate enough interest for 50 adapters, price will be $13.00 each + shipping. More adapter may or may not reduce the price significantly.
Please post here if you're interested, and how many adapters you'd be interested in purchasing. This is not a commitment to buy, nor is it a commitment for me to manufacture.
I'm willing to front the >$500.00 this project would cost, but if you commit to buy later, please buy!
Last thing, I'm not really happy with the battery contacts, but they're all I could find. If anyone knows where I might find some round AA contacts of small diameter, please let me know! These will work, but the + terminal is only .125" in diamter. This is about the size of some of my NiMH + terminals, but smaller than some alkalines I've measured.
If anyone has any suggestions for improvements or questions please post!
Thanks for looking.
