DIY powered rocker query

Discussion in 'Electronics & Electrics' started by Gooliez, Oct 26, 2018.

  1. Gooliez

    Gooliez Member

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    Hi guys,
    We have a 7 week old child and she will only really sleep in a battery operated rocker... it takes 4 x D size batteries. it's costing us a absolute fortune in batteries.

    if i was to connect a plug like a laptop power socket to the battery terminals. what voltage power brick would i need to keep it powered and not blow it up ?

    the batteries are 1.5v and there's 4 so does that mean i need 6V to run it ?

    have one of those adjustable power bricks and the right socket.. just need to know the right voltage

    Cheers !
     
  2. kamehameha

    kamehameha Member

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    What is the orientation/configuration of the 4 D cells?
     
  3. Jazper

    Jazper Member

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    6v is the right voltage, but you will need a certain amount of current also. I would want a 2Amp adapter.

    Anything up to 7.5v should be ok as d cell batteries often output a bit more when they are fresh
     
  4. Mathuisella

    Mathuisella Member

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    in your gearbox...grindin
    very likely to be 6 volts.

    4 x 1.5 volt cells in series, the D size is just the capacity of the battery.

    Have you got a multimeter > ? easy way to test with one of those, if you are unsure, post up images of the battery compartment with the batteries out and make sure to get all angles so we can see the contacts inside and any markings ect: :)
     
  5. OP
    OP
    Gooliez

    Gooliez Member

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    Last edited: Oct 26, 2018
  6. kamehameha

    kamehameha Member

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    It seems like all baby rockers seem to use the same generic motor. So specs are as follows:

    Voltage Range (VDC): 3.0-6.0
    Current (Amps): 0.05
    No Load Speed(RPM):5150
    Rated Speed(RPM): 4300
    Torque (g-cm): 21
    Power (W):0.27
    Terminal Type: solder
    Shaft Diameter: 0.079"
    Shaft Length: 0.42"
    Size: 1.26"D x 0.77"L

    Based on that, you could probably just use a phone charger rather than anything fancy.
     
  7. Mathuisella

    Mathuisella Member

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    pretty much, just a 1 or 2 amp phone charger.

    wall socket phone charger to USB cable, cut the end and solder it in :)
     
  8. OP
    OP
    Gooliez

    Gooliez Member

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  9. WooKiE_MaN

    WooKiE_MaN Member

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