Rumble Mod

Discussion in 'Wii U - Hacking & Backup Loaders' started by drakorex, Sep 10, 2014.

  1. drakorex
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    drakorex GBAtemp Advanced Maniac

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    I decided to add a second rumble motor to my Pro Commander because I can. I was expecting twice the rumble, but instead each motor seems to be producing half the output. Is there any way to crank it up, or was I better with just one motor?
     
  2. jonthedit

    jonthedit GBAtemp Advanced Maniac

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    Depending on your MB you can feed more amps to the port you are connected to.
    More power = more rumble.
     
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  3. Elusivo

    Elusivo GBAtemp Fan

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    I guess a simple way would be to use the battery to power the motors and use a simple transistor switch like this www.electronics-tutorials.ws/transistor/tran_4.html
    Vcc would be the battery, Vin would be the + point where the motors connect in the board and Vout where you will connect the motors. (tho not an ideal solution as the battery's voltage alone decreases over time)
     
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  4. gunner007

    gunner007 GBAtemp Advanced Maniac

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    If you connected them in parallel, you're splitting the current in half.
     
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  5. drakorex
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    drakorex GBAtemp Advanced Maniac

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    I did red to red and black to black. How else can I do it?
     
  6. Slartibartfast42

    Slartibartfast42 GBAtemp Advanced Fan

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    Yea, that's in parallel, so physics says you get less current. But if he connects them in series, won't that drop the voltage? So less power either way.

    So you either need to figure out how the rest of the controller's power regulation system works and attempt to modify it by replacing a resister or something, or do the above mentioned transistor/battery mod.
     
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  7. air2004

    air2004 Air

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    More rumble and a chance of it blowing up or catching fire ....Is it worth it ?
     
  8. drakorex
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    drakorex GBAtemp Advanced Maniac

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    Absolutely! :D
     
  9. driverdis

    driverdis I am Justice

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    there is still a 0% chance more of blowing up or catching fire than before the mod as it is just rumble motors.
     
  10. TeamScriptKiddies

    TeamScriptKiddies Licensed Nintendo (indie) Game Developer

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    Planet Earth :P
    Regardless of the way you connect that extra motor, you're putting a larger load on the ctontroller which will lead to the rumble "enhancement" essentially cancelling out. Without adding an additional power source or replacing a resistor or something, this will not work the way you want it to, plain and simple.

    As for things "blowing up" that's not likely because its low dc voltage, HOWEVER you still run the risk of damaging your controller and components within when altering the current and voltage in this already functioning circuit, so proceed with caution.

    Most importantly thoug, have fun and post pics once you get it up and running :-)
     
  11. Tomobobo

    Tomobobo Champion.

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    The one thing I don't see anyone mention you try is removing the stock motor and replace it with one that works better but uses the same power.
     
  12. Slartibartfast42

    Slartibartfast42 GBAtemp Advanced Fan

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    Because there is no such thing. Conservation of energy.
     
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  13. Tomobobo

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    You're telling me all rumble motors are created the exact same way? They all have the same specs?

    They all run on the same number of amps and volts? They all vibrate as soft as the Wii U Pro Controller's rumble?
     
  14. gunner007

    gunner007 GBAtemp Advanced Maniac

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    Only one of two ways.

    1. Find a way to increase the voltage and hope it doesn't cause anything to burn up on the motors.

    2. Add a resistor in parallel with your two motors. Find resistance of each motor.

    Find out the resistance of a single motor, solve V=IR (knowing V and R) and you'll know the current delivered to your first motor.

    Req = 1 / (1/R1 + 1/R2 + 1/Rn) (if you need to know the equivalency of resistors in parallel)
     
  15. Slartibartfast42

    Slartibartfast42 GBAtemp Advanced Fan

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    No, they have different specs. Volts, amps, max rumble, speed, weight etc. But they probably all have a similar efficiency ratio, ie, the fraction of energy wasted to heat, noise, etc. In this case, the actual power used is fixed by the controller, let's call it 5W for convenience, since I don't know the real value. I'm claiming, and I could be wrong, that 5W worth of rumble would feel similar with different rumble motors. You could put in a smaller weight motor which would vibrate faster for the same 5W, but not as much strength. That would feel different, but not really stronger, right?

    He wants twice the total rumble feel for the same power. To get that, you would need to double the efficiency of the motor. That's only theoretically possible if the efficiency is less then 50%, but I think it's higher then that, right? It's not an incandescent light bulb. If it is less, well, doubling efficiency is difficult. It would be expensive. Imagine taking a pickup truck that gets 12 mpg, and trying to make it get 24mpg, with the same weight, the same HP, the same tourque, etc. If we have the technology to do that, it's going to cost a lot more money, placing that truck outside the price range it was originally designed for.

    Of course there are motors out there that have a higher theoretical max vibrate, possibly even in the same physical size, but they will need more power to get there, right? Unless there really is an affordable one with double the efficiency, but if the efficiency is already higher then 50%, that's impossible. Does anyone know the typical efficiency for a vibration motor? Isn't the normal efficiency of an electric motor in the 80's to 90's range? You can't double those. There just isn't enough wiggle room in the efficiency rating to cause the kind of change he wants. Granted, I don't know the equation, which could be nonlinear, between actual power used and perceived rumble effect, but I doubt you could achieve 100% increase in perceived rumble for a 0% increase in power under any conditions. Maybe by messing with the parameters you could get 10-20% increase, but not 100% as desired.
     
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