Introduction: Chromecast On/Off Switch

Picture of Chromecast On/Off Switch

As any of you Chromecast owners will know, when you use the TV as the power supply for your Chromecast, your Chromecast will be on as long as the TV is on. Typically this isn't an issue, but we use an aerial to get our live TV and having the Chromecast on interrupts the signal. This switch was a project I did just so it could be turned off without unplugging it, enjoy.

-Soldering iron/solder

-Wire stripper

-Hot glue gun (optional)




-On/On toggle switch

-Chromecast power cable

Step 1: Strip the Cable

Picture of Strip the Cable

Use your wire stripping tool to split the cable that came with the chromecast at two points about an inch apart. Then use an x-acto knife to cut the length of insulation in half and remove it. After that, you'll have to cut/peel off the outer shielding for the cable. Then there will be a bunch of uninsulated wire, this is also the ground so just peel that back until you only have the positive, negative, and ground wire showing. Now cut all three right down the middle, and use a stripper to peel back the insulation so the three wires can be soldered later.

Step 2: Creating the Housing

Picture of Creating the Housing

I just used a project enclosure I bought from radioshack at a clearance price. You can find these online or at your local electronics project store. I drilled two holes on either side for the USB to go through, and one on top for the toggle switch.

Step 3: Soldering

Picture of Soldering

Once you've fed the cable through each side of the enclosure, solder the negative wires together and the ground wires together. Now if you have an on/on toggle switch with three prongs, just solder the two positive wires to any two prongs that are directly beside each other. After this I hot glued everything to prevent a short. I also hot glued where the usb cable enter and exits the enclosure to stop it from being pulled and damaging the switch.

Step 4: Done!

Picture of Done!

I added a little on/off emblem for ease of use, and the chrome logo from the box. Hope this guide helped :)


VidgoTV (author)2016-08-12

Solid project.

LarryF29 (author)2016-04-28

I also use just antenna, did not see a difference with Chrome Cast on or off

ksexton1 (author)LarryF292016-05-02

Ssome TVs automatically switch to the live connection, this is what I thought the issue might be.

LarryF29 (author)ksexton12016-05-02

Ok got you, never seen that happen myself

MatthewM232 (author)LarryF292016-04-28

Im not sure there is, my dads the one who made the claim and kept unplugging the chromecast, so this was a resolution.

Mark 42 (author)2016-04-28

Does this completely turn off Chromecast? Sometimes my wifi on my phone connects to Chromecast, and I don't realize it did. That means I end up eating into my data plan without knowing it.
We don't use Chromecast much, so I'd love to turn it off when not in use.

ksexton1 (author)Mark 422016-05-02

If it's connecting through the wifi, it shouldn't be using your data. the connection is phone-router-chromecast, and never gets to the cellular data or house data. The data is used when you are actually doing something like streaming from youtube or or browsing the web, etc. Also background connections on apps on your phone. Even then, if on the wifi, it's not using your phone's data.

MatthewM232 (author)Mark 422016-04-28

Absolutely! The chromecast is powered by the USB cable that either plugs into your TV or the wall for power. This switch is just halfway down the USB cable and it disconnects the positive lead when switched off, we found that the built in standby mode just wasn't enough.

Gadget93 (author)2016-04-29

This would be great if you also please explain what a "chromecast" is. Perhaps it's something British. I don't know. In my part of usa, we've never heard of such a thing. Please explain.

tyler roberts (author)Gadget932016-05-01

<sarcasm>because google isn't working</sarcasm>

Mark 42 (author)Gadget932016-04-30

Chromecast is a type of Dongle.

MatthewM232 (author)Gadget932016-04-29

It's a device made by Google that plugs directly into the HDMI port of your TV (like a flash drive) and is then powered by the USB port on your TV. You can use it to stream videos, music, play games, or even mirror the screen of your phone or laptop. It costs $45.

Gadget93 (author)MatthewM2322016-04-29

Oh cool. Thanks.

ErnestK8 (author)2016-05-01

I have mine plugged into my surround sound system, no interference at all.

MatthewM232 (author)ErnestK82016-05-01

Yeah, I dont even think it actually interferes with anything, it was just to stop my dad from unplugging it because he thought it did haha.

More Cowbell (author)2016-05-01

Congratulations on a good build and being featured on the instructibles facebook feed!

EsaE (author)2016-04-30

Or you could supply power to the Chromecast with an extension cord with an on/off switch.

MatthewM232 (author)EsaE2016-05-01

Well this is a DIY site. Plus it's powered from the USB port on the TV, not a wall outlet. And even then you'd have a ton of extra cable and it would look pretty messy.

EsaE (author)2016-04-30

I had no idea trolling was a thing on Instructables...

sl0j0n (author)2016-04-30

Hello, "2yz4cory":
JIC you're 'for real', the "Chromecast Device" is micro computer that connects to the internet via a wireless router, & let's you 'play' the internet on your TV, though a HDMI port. [also for Gadget93]
A "HDMI port" is a "High-Definition Multimedia Interface", "a proprietary audio/video interface for transferring uncompressed video data and compressed or uncompressed digital audio data from an HDMI-compliant source device", such as a Chromecast. []Check out, fmi.]
USB is the "Universal Serial Bus, an industry standard developed in the mid-1990s that defines the cables, connectors and communications protocols used in a bus for connection, communication, and power supply between computers and electronic devices".
Basically, these a different ways to connect a TV to other 'entertainment devices'.
Hopefully helpful.
Have a GREAT day, Neighbors!

DerrellT1 (author)2016-04-29

I think that's pronounced rasslin' and I'm not buyin it.

Gadget93 (author)DerrellT12016-04-30


Russell Dimond (author)2016-04-28

Good project, however…(no, this is not going to be a negative comment.) in addition to solving YOUR issue, this looks to be a good way to cut back on unnecessary electric usage. My little Chrome Cast gets VERY warm while being used. Anything that produces heat, draws its fair share of electricity. Has anyone out there determined what the current draw is on these little electricity-thieves? I like your idea of simply throwing a switch, rather than reaching behind the set, to unplug the unit each time it's not being used. Thanks! ??

Roughly 450ma / 5v at full load. So at most, 2 watts. Less than a third of a modern phone charger. The heat is the processor not having a heat sync, and being in a small plastic case. It's a negligible hit to power use leaving it on.

It looks like its 730 watt hours/year according to an article I just read. So less than half a dollar/year to power it when its in standby mode. Thanks!

sail4sea (author)2016-04-28

It is too bad that the only local source for those project boxes was Radio Shack which have all closed. Off to order some online, or get a 3D printer.

piratetv1 (author)sail4sea2016-04-28

mint tins are perfect for these

sharpstick (author)sail4sea2016-04-28

Cigar boxes make good project boxes. For something this small, anything small, candy tin . . .

MatthewM232 (author)sail4sea2016-04-28

When I say RadioShack I actually meant the Canadian company that replaced them (The Source), they're still alive and well but they recently stopped carrying all the project components so I picked up all the enclosures they had for a few cents each (they went on clearance).

OWK000. (author)2016-04-28

This is something Chromecast forgot that is a total must have. I just bought a cheap green Xmas power bar to turn off my modem/router $4. It needs this too. For about $6 you can get an outlet with a switch on Amazon and one with a wireless remote on off switch for $10. So... I'll save my projecting for something that is harder to buy, like Tilong rat traps.??

Squishy_razor (author)OWK000.2016-04-28

I agree totally! There are a wide variety of micro USB cable on/off switches online.

Here is one!

Yep, that's exactly what I made. But this is a DIY site afterall.

John T MacF Mood (author)2016-04-28

It would be nice if the HDMI standard allowed selectively allowing ports to control or not control the input when they come on.

This is a great fix for that inadequacy of the HDIMI port standrd.

gavinnn (author)2016-04-28

If you're resoldering the wires, why not cut only the red wire and leave the other two? Drill your enclosure at the seam where the sides meet so the wire is enclosed but doesn't have to pass through a hole.

MatthewM232 (author)gavinnn2016-04-28

Yep, that would have worked too! I just thought it would look better having it right through the middle tham being stuffed in at the top.

ccray1954 (author)2016-04-28

This is brilliant. Never would have thought of this. Excellent where you put on and off switch.

this is brillant

MatthewM232 (author)ccray19542016-04-28

Thank you!

AnalogueAdam (author)2016-04-27

Simple and brilliant. Good detailed pictures as well. Keep it up and have fun out there.

MatthewM232 (author)AnalogueAdam2016-04-27

Thanks :) I got more coming!

tomatoskins (author)2016-04-26

This is such a simple fix! I love it!

MatthewM232 (author)tomatoskins2016-04-26

Thank you! My first instructable :)

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