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There are a lot of times when it is useful to be able remotely turn something on or off. In this instance, my son has a small Power Wheels car. I wanted to be able to remotely turn the car off if he drives too far away or in the wrong direction. So I designed a simple remote kill switch. This lets me turn the car (or anything else) on and off with a remote. As an extra safety feature, if the car goes outside the range of the remote, it will automatically turn off.

Step 1: Watch the Video

Here is a video walkthrough of the project

<p>so that's who has been jamming my 900 MHz and/or 2.4 GHz baby monitors, wireless cameras, Wi-Fi, cordless phones and microwaves.</p><p>just kidding.</p><p>although I was kind of happy and annoyed when I was 6 - 10 as I found out that my walkie-talkies were on the same frequency as the baby monitor ( even after the replacement from the recall came). and if I'm remembering right I think the cordless phone was on the same frequency or at least could be as it had 10 of them. oh the days of unencrypted communication.</p><p>I do have to say that this is a cool project, that I will probably end up doing myself someday?</p>
<p>Can it be used on dogs, children and husbands, too?</p>
<p>There is a product... Invisible Fence for dogs. I know of one father who used it in a creative parenting way on his children to keep them in the yard. He is currently in jail for child abuse.</p>
<p>There is a product... Invisible Fence for dogs. I know of one father who used it in a creative parenting way on his children to keep them in the yard. He is currently in jail for child abuse.</p>
<p>There is a product... Invisible Fence for dogs. I know of one father who used it in a creative parenting way on his children to keep them in the yard. He is currently in jail for child abuse.</p>
<p>Nice build! I built a Toylander for my daughter and did a similar thing, however just used a very cheap 433MHz transmitter/receiver from ebay - 2 button controller that looks like a garage door opener. It also had 2 separate relayed outputs so I used one button to activate a buzzer so I could warn her she was heading where I didn't want and the other button to cut out the motor. Rather than putting the relay on the high current motor circuit I put it on the throttle circuit so that activating the cut out is the same as taking your foot full off the throttle. The reason for this which some people should be careful of is that some of these electrics cars (including the one I built) use regenerative/electric braking i.e. when you take your foot of the throttle the speed controller actually uses the motor(s) as dynamo and feed charge back into the battery - although the main reason is the braking force this creates. If you break the high current motor circuit, any vehicles with this sort of braking will glide to a stop slowly rather than braking to a halt quickly (which is probably what you want when your child is about to drive into a lake!)</p>
<p>Do you think you could include any more information about this project? I've seen those modules, but haven't really experienced any simple applications that didn't require an Arduino. Bonus points for making an Instructable on the radio communication part!</p>
<p>Hey this is an amazing idea! Never thought of it before. Thaks!</p>
<p>If you could make this look like a sonic screwdriver, that'd be <strong>fantastic!</strong></p><p>(references)</p>
<p>You could also buy something like this that would work for a remote kill switch. </p><p><a href="http://www.dx.com/p/mtdz006-rf-1-channel-wireless-remote-controller-switch-module-green-blue-153147" rel="nofollow">http://www.dx.com/p/mtdz006-rf-1-channel-wireless-...</a></p>
<p>Nice! I like how simple an versatile this is. You have my vote.</p>
<p>Was this Instructable inspired by <a href="http://newyork.cbslocal.com/2014/08/03/police-6-year-old-accidentally-drives-electric-kids-car-onto-bronx-river-parkway/" rel="nofollow">this</a>?</p>
<p>No but that is a good example. </p>
<p>Thanks for sharing!</p>
<p>Cool project, you really killed it!</p>
<p>Nice project, well done. Gotta keep the kiddos safe!</p>

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Bio: My name is Jason Poel Smith I am a Community Manager here at Instructables. In my free time, I am an Inventor, Maker, Hacker, Tinker ... More »
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