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gooni
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11 posters

    Nerf Stampede Voltage Modification

    NachoTaco
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    Nerf Stampede Voltage Modification Empty Nerf Stampede Voltage Modification

    Post  NachoTaco Thu Mar 10, 2011 7:00 am

    Nerf Stampede Voltage Modification

    This Modification will increase the Rate of fire of you Nerf Stampede.

    Modification Outcomes
    I present to you, the RoF increase mod for the Nerf Stampede!
    The main two reasons why you would do this to your Nerf stampede are because of the increased Rate of Fire and the drastic Weight Reduction.
    The Stock stampede shoots around 3 darts per second but with this mod you can shoot nearly 4 darts per second.
    The stock batteries of the Nerf stampede are six D cell Batteries. Just the batteries weigh 650 grams. With this modification I will be using 8 x AA batteries,
    and these weigh 230 grams.

    Modification Description
    I really wanted a gun that would be great fun to use in Nerf wars and playing Nerf with my little brother at home,
    and I thought that the increased Rate of Fire and weight reduction would accomplish this.

    Modifications Process
    List of Tools/Materials:
    - 8 x AA Batteries
    - 8 x AA Battery pack/holder
    - Small Philips Head Screw Driver
    - Tin Snips (or a good pair of scissors)
    - Solder
    - Soldering Iron
    - Cardboard
    - Duct Tape or E-Tape

    Step 1:
    First you need to take the battery tray out of the Nerf Stampede.
    Step 2:
    Then you will need to unscrew the six screws on the bottom of the battery tray.
    Nerf Stampede Voltage Modification 100_4689

    Step 3:
    Lightly pull the battery tray apart (about 3 cm apart) and shake or somehow get those battery holder things out.
    Nerf Stampede Voltage Modification 100_4691
    Nerf Stampede Voltage Modification 100_4694

    Step 4:
    Cut off the two pieces of plastic that are sticking up in the middle of the battery tray with some tin snips or scissors.
    Nerf Stampede Voltage Modification 100_4695

    Step 5:
    Place your 8 x AA batteries into your battery pack/holder.
    Nerf Stampede Voltage Modification 100_4698

    Step 6:
    Solder your connector onto the positive and negative terminals on the stampede battery tray. Alternatively you could just solder your battery pack directly.
    The spring like coil is the negative and the flat piece of metal is the positive.
    Also note you are soldering this to the side of the battery tray that enters the Stampede first.
    Nerf Stampede Voltage Modification 100_4706
    Nerf Stampede Voltage Modification 100_4704

    Step 7:
    Connect the battery pack up and then add the necessary pieces of cardboard in order for you Battery pack to fit in nice and snug.
    Nerf Stampede Voltage Modification 100_4703
    Nerf Stampede Voltage Modification 100_4708
    Nerf Stampede Voltage Modification 100_4710

    The only downside to this modification is that you would be regularly buying AA batteries. So I would recommend
    getting some decent re-chargeable batteries to save you the time and money of buying new batteries every time your old ones run out.
    Enjoy:)

    Demonstration Video:



    Last edited by NachoTaco on Thu Jun 02, 2011 12:33 pm; edited 1 time in total
    clunk07
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    Post  clunk07 Thu Mar 10, 2011 8:22 am

    Nice write-up, but I'd suggest using 4 x 14500 Li-ion batteries without PCB protection. You don't need to mess around with hacking the battery tray, as a 4 x AA holder fits in where a D cell battery usually does. This will also give you around 16.8 volts, instead of 12v.
    Although, this is a good option for people who can't get access to 14500's. Another option would be to use a 10 x AA holder, but again, rechargeable NimH or NiCd's are fairly expensive.
    oxymoron
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    Post  oxymoron Thu Mar 10, 2011 8:25 am

    Increasing ROF on a stampede is not exactly a new concept but you did a great job on the write-up :cheers:. I originally did the same thing to my Stampede but I used a 10xAA holder for 15V and fitted a 9Kg spring etc.


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    Roger Explosion
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    Post  Roger Explosion Thu Mar 10, 2011 9:13 am

    There is also a much easier way of doing this mod
    Nerf Stampede Voltage Modification Imgp1688
    wiring 2 4AA battery holders in series. Don't even need to modify the battery tray.


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    NachoTaco
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    Post  NachoTaco Thu Mar 10, 2011 9:26 am

    Roger Explosion wrote:There is also a much easier way of doing this mod
    Nerf Stampede Voltage Modification Imgp1688
    wiring 2 4AA battery holders in series. Don't even need to modify the battery tray.

    Good idea. A main reason I did this mod was that I had the materials lying around, but yes if had I put more time into it and
    spent a little bit of money then I would have done something a bit simpler.

    oxymoron wrote:Increasing ROF on a stampede is not exactly a new concept but you did a great job on the write-up cheers. I originally did the same thing to my Stampede but I used a 10xAA holder for 15V and fitted a 9Kg spring etc.


    Yes a thought about doing something like this; adding around 16V and replacing the spring, but I didn't
    have any suitable springs and I had all the materials for 12V so that's what I did.

    Thanks
    Synergie
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    Post  Synergie Thu Mar 10, 2011 10:59 am

    clunk07 wrote:Nice write-up, but I'd suggest using 4 x 14500 Li-ion batteries without PCB protection. You don't need to mess around with hacking the battery tray, as a 4 x AA holder fits in where a D cell battery usually does. This will also give you around 16.8 volts, instead of 12v.
    Although, this is a good option for people who can't get access to 14500's. Another option would be to use a 10 x AA holder, but again, rechargeable NimH or NiCd's are fairly expensive.

    Where might I find the Li-on batteries required for your first suggestion?
    Xoenz
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    Post  Xoenz Thu Mar 10, 2011 11:08 am

    Synergie wrote:
    clunk07 wrote:Nice write-up, but I'd suggest using 4 x 14500 Li-ion batteries without PCB protection. You don't need to mess around with hacking the battery tray, as a 4 x AA holder fits in where a D cell battery usually does. This will also give you around 16.8 volts, instead of 12v.
    Although, this is a good option for people who can't get access to 14500's. Another option would be to use a 10 x AA holder, but again, rechargeable NimH or NiCd's are fairly expensive.

    Where might I find the Li-on batteries required for your first suggestion?


    Only place I know of is dealsextreme.

    Pm me if you want the link.
    gooni
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    Post  gooni Thu Mar 10, 2011 2:54 pm

    Xoenz wrote:
    Synergie wrote:
    clunk07 wrote:Nice write-up, but I'd suggest using 4 x 14500 Li-ion batteries without PCB protection. You don't need to mess around with hacking the battery tray, as a 4 x AA holder fits in where a D cell battery usually does. This will also give you around 16.8 volts, instead of 12v.
    Although, this is a good option for people who can't get access to 14500's. Another option would be to use a 10 x AA holder, but again, rechargeable NimH or NiCd's are fairly expensive.

    Where might I find the Li-on batteries required for your first suggestion?


    Only place I know of is dealsextreme.

    Pm me if you want the link.

    Also if you look on ebay you will find them too.

    Gooni.
    littlebro05
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    Post  littlebro05 Thu Mar 10, 2011 4:06 pm

    Yeah, I would recommend you not to put on full auto for more than 4-5 shots. You'll burn out the motor that way lol.

    Well at least in this modification write-up it shows the versatility of voltage upgrades you can do with materials that you have.
    inf0rm3r
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    Post  inf0rm3r Thu Mar 10, 2011 5:23 pm

    I applaud the complexity of your writeup. The pictures are outstanding. This is good shit
    clunk07
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    Post  clunk07 Thu Mar 10, 2011 7:57 pm

    Deal Extreme is probably the best bet - if not the cheapest. Just make sure you purchase unprotected batteries, otherwise it won't work.

    Another slightly more expensive option, is to purchase the batteries from here:

    http://www.cpfmarketplace.com/mp/showthread.php?230876-AW-s-LiIon-Batteries-Sales-Thread-*Part-12*

    Roughly $24 for 4 batteries delivered with tracking. They're alot higher quality, and you're guaranteed succesful recharges for a long time. My experience with Trust/Ultra Fire batteries is that while they are inexpensive, they generally only recharge a handful of times. You can also buy the appropriate charger from the above link, for a very good price.

    Just remember that when using non-protected batteries, you need to keep an eye on them whilst charging, to ensure they don't exceed 4.2v. You don't need to monitor them constantly, just a quick check with a multi every 10 minutes or so will be fine. Once you've charged them a few times, you'll have a better handle of the time it takes, so you won't need to check them as often.
    lefty
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    Post  lefty Sat Mar 12, 2011 5:43 am

    Or you could try a 12v 800mah SLA from century for about $40 inc charger. They weight about the same as the aa setup and are from a local business. We run a BT + other spring and still fire more than 3 darts a second. If you need more RoF, try aiming
    clunk07
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    Post  clunk07 Sat Mar 12, 2011 3:32 pm

    lefty wrote:Or you could try a 12v 800mah SLA from century for about $40 inc charger. They weight about the same as the aa setup and are from a local business. We run a BT + other spring and still fire more than 3 darts a second. If you need more RoF, try aiming

    Higher voltage does more than just increase ROF. If you're using a heavier load spring, more voltage will not only increase ROF, but will extend the run-time of your battery/s.
    phuonguyen
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    Post  phuonguyen Sun Mar 13, 2011 4:31 am

    If you were to use higher volatges, I would recommend using heavier gauge wire, to accomodate for the higher amperage of the output power. You wouldn't want to go through the wiring to fix the melted 0.5mm wires that are used in Nerf/BB electronics.

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