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Get rid of batteries on the Fisher-price swing to DC input Answered

We bought a new swing recently and has been consuming 4 C batteries every week. I am wondering if can hook it up to Wall transformer. Any ideas? I have some wall-wart at home that output 6-9v. Can I use them? I can convert the wall-warts as per the instructions here: https://www.instructables.com/id/wall-transformer-for-project-power-supply/

but do i need to change anything in the swing? and how to hook it up?

Please advice ..

Thanks

Discussions

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JJG4QDC
JJG4QDC

6 months ago

Okay I'm just going to go ahead and do it I bet it's a boppy boppy swing it's not Fisher-Price and like I said I'm pretty sure I know how to where it's taken out on the one side with the speaker and the buttons it just happens to be that there's one two three four five six seven eight and there's like 11 screw areas and it is unnecessary to unscrew everything and if there's wires in there that have to be careful with you know just please give me the heads up I'm going to go ahead and unscrew it thanks

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Orngrimm
Orngrimm

Reply 6 months ago

I almost suffocated reading this sentence....

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JJG4QDC
JJG4QDC

6 months ago

Okay same question I have a boppy boppy baby swing and small one of the ones lower to the ground there are two big plastic sides at the top and I'm assuming the batteries are changed on the side that the speaker and control buttons are. I would like to make sure that I don't take every screw out of it and then it be a dang mess so please I would very much appreciate just a picture as if I had bought the swing first hand and have it show where you unscrew take the batteries out and put them back in please and thank you

IMG_20190928_102828.jpgIMG_20190928_102823.jpg
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Twanikqua
Twanikqua

10 months ago

Do i need the cord if i have batteries ? Or i need both?

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NachoMahma
NachoMahma

10 years ago

. If it uses four batteries, it's probably a six volt system. Shouldn't take a lot of conversion. Just replace the battery holder with a jack that fits the output plug of your wall-wart. Make sure the wall-wart has a high enough current output rating (more than what you need is OK - the swing will only pull as much current as it needs).

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NachoMahma
NachoMahma

Reply 10 years ago

. 1.8 A should be plenty, but you need to know how much the swing pulls to be sure.

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sulakhe
sulakhe

Reply 10 years ago

hi, it looks like 1800mA current output wasn't enough. The swing isn't swinging (i can only hear some noise when it tries to but then fails), but it can play music. Is there a way I can increase the output of the current adapter and how can I find out how much the swing actually needs? Thanks.

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paulo500
paulo500

Reply 9 years ago

Im sure you're not using the swing anymore, as this thread is over a year old. But for other's in the same boat as me, ill share my "ible".

I have the exact same swing as the OP, and I was able to find a Nokia wall-wart kicking around which is 5.9V @ 800mAh. The swing runs perfectly fine with everything running at full (full swing, tunes at full volume, rotating overhead objects), on this a/c adaptor when I loosely connected the + and - to the battery terminals in the swing...(end of series).
I didn't have a fully charged set of 4 "D" size batteries to test the initial voltage and current draw, but when i was running the Swing with batteries, my multimeter was showing ~0.5amps and of course the volts dropped to about 4ish. These batteries were indeed loosing their charge and the swing was starting to "slur" its tunes and the rest was slowing down.

Im not going to open up swing as the OP did, so i cut a couple pieces of round-stock wood about the same diameter as a "D" battery, and screwed a metal screw into the top (+) end. Then i attached the wall-wart (+) wire to this screw with a U-connector for easy disconnect if i want. I did the same for the (-) side of the swing and just flipped the 2nd piece of wood around to contact the (-) spring.
So now instead of batteries, i've got 2 wood "batteries" in compartment 1 and compartment 4 (Top and bottom end of series). The wire just hangs out under the battery cover, of course. Pretty clean setup.

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kelseymh
kelseymh

Reply 9 years ago

https://www.instructables.com/id/How-to-Make-AC-Powered-Batteries-for-your-DC-Pow/
https://www.instructables.com/id/Run-any-battery-powered-item-through-AC-power./
https://www.instructables.com/id/Convert-a-Baby-Swing-from-Batteries-to-AC-wall-P/
https://www.instructables.com/id/Add-an-AC-adapter-to-a-battery-powered-device/

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NachoMahma
NachoMahma

Reply 10 years ago

. You can't really get more power out of a power supply unless you start swapping parts. Ie, not feasible. . All I can find out is that alkaline C cells are rated at ~8000 mAh. What that means as far as instantaneous current, I don't know.

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sulakhe
sulakhe

Reply 10 years ago

thanks for the reply. In fact the swing uses 4 D batteries, not C as I had thought before.

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sulakhe
sulakhe

Reply 10 years ago

Thanks for your reply. I had seen your post after which I went ahead and bought a 6v adapter and tried to plug it in to the swing (I used alligator leads with boots) and connected them to the springs in the battery box) . Somehow it is not working. The music and an overhead toy work, but the swing doesn't seem to work My question is, is there anything I can do to identify the problem. Thanks for the other link, it is exactly what I am trying to do, and theoretically what I did is exactly same as what is explained in the link. But it just doesn't work. Do you think the adapter should be a regulated adapter?

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kelseymh
kelseymh

Reply 10 years ago

Connecting alligator clips to the battery-box springs won't get you power in. Both springs are ground (negative). The flat metal tabs contact the positive ends of the batteries, and there's an assumption that every battery slot will be filled: one tab is wired to connect to one spring, so that all the batteries end up in series. You'll need to provide such a connection yourself (and you need to know which tab/spring are meant to be "middle" vs. which are connected to wires inside the unit). Assuming that you've got things wired up properly, then the question is whether your wall-wart is rated to provide sufficient current to drive the swing motor. Both of these things probably require opening up the unit. The motor may have a label on it with specs. And you'll be able to see where things connect inside the battery box.

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sulakhe
sulakhe

Reply 10 years ago

Hi kelseymh, I am connecting one alligator clip to a spring and another to a plate, as shown in the image I am attaching (with circles). Ideally, the spring should be connected to the negative wire and the plate to a positive wire.

what do you mean when you say: "Connecting alligator clips to the battery-box springs won't get you power in."? You mean generally or just in case of my setup?

I am using the adapter bought from radioshak: http://www.radioshack.com/product/index.jsp?productId=2049709
It is a 6v 1800mA. I thought 1800mA was good enough for a swing!!

In one of the links you sent earlier wrt to swing, i saw them using a Motorola charger which as far as I know gives lesser output than 1800mA and lesser volt than 6V. Anyways, i will open the batterbox and see if connecting directly to the wires makes any difference.

Thanks

swing-battery.jpg
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kelseymh
kelseymh

Reply 10 years ago

I misunderstood what you wrote. It sounded like you connect one clip to one spring, and the other clip to a second spring; sorry for the confusion. What you wrote here, "I am connecting one alligator clip to a spring and another to a plate," is exactly what I was trying to say.

Your picture is great, and shows that you've got the kind of box where you can actually see all the interconnects. The TinyLove mobile we have didn't have that feature :-(

I agree with you that 1.8 A ought to be plenty for a swing, but maybe not. You might also try popping batteries back in and see if the swing comes back to working that way. If not, then there's something else going on (a separate switch? an internal fuse?).

If the swing does work on battery, try using an ammeter (do you have a multimeter) to see how much current is coming out of the battery box.