Your original schematic isn't clear but I think you're trying to use the N-Channel MOSFET as a switch. Since I don't know the current required by your LED strip you should spec one out yourself. This video gives a great introduction to MOSFETs. Below is an explanation for each of the components used.
R1 - current limiting resistor to limit the gate current to reduce voltage oscillations
R2 - pull down resistor to avoid spurious activations by creating a defined voltage level at all times
R3 - load resistor that represents the position of your LED strip in the whole schematic.
simulate this circuit – Schematic created using CircuitLab
As others have mentioned, it may be easier to just power the LED strip from a source that's controlled by the ignition. If it's a 12V supply you'll have to use a voltage regulator like the LM7805 to reduce the voltage. It's only rated for about 1A though. If your strip needs more consider a buck converter.
Answer from SRR on Stack ExchangeWalmart
walmart.com › auto & tires
Usb Lights Car
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Amazon
amazon.com › Interior-MultiColor-Lighting-Function-Controller › dp › B07QWZVQC1
Amazon.com: Car LED Strip Lights Christmas, 4Pcs 48 LED Interior Lights, Multicolor Music Car Strip Light Under Dash Lighting Kit with Sound Active Function and Remote Controller, DC 5V : Automotive
LED Strip with USB cable for Car TV: The led strip lights come with USB cable, powered by DC 5V, not only suitable for car decoration, but also tv bias lighting, home, KTV, party decortaion.
Videos
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How to install Car Interior RGB LED Strip Lights - YouTube
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Xprite
xpriteusa.com › home › rgb led interior usb car light set 4pc | celestial series
RGB LED Interior USB Car Light Set 4PC | Celestial Series
RGB LED Interior USB Car Light Set 4PC | Celestial Series
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All About Circuits
forum.allaboutcircuits.com › home › forums › hardware design › general electronics chat
Is it safe plugging car led strips into head unit? | All About Circuits
November 7, 2023 - ... Click to expand... They are designed to be plugged into a USB 5V port. ... I wouldn't try it. Just plug it into a cell phone charger, one that plugs into the 12V outlet ( cigarette lighter { days long ago } )
Reddit
reddit.com › r/led › led strip w/ usb power source able to convert to 12 volt for car?
r/led on Reddit: LED strip w/ USB power source able to convert to 12 volt for car?
May 9, 2022 -
Hi team, I recently got some unique LED string light from alibaba.
Unfortunately, it's got a USB end for power. Could I cut off the USB end, strip the shielding and solder it into my dome light wiring in my vehicle?
I'd like these fairy lights to be wrapped around my Jeep's roll bar and come on when the interior lights come on but unsure if these strips would accept 12 volts without burning up.
Admittedly, the strips (when I turn them to the white color) start fading to yellow 3/4's of the way down the strip. I understand it's due to lack of power. Perhaps a straight 12 volt source would work?
I am trying not to use an inverter like a cigarette lighter power plug because then my idea of the lights coming on with the interior lights would go out the window then.
Sadly, I cannot find bluetooth controllable, color changing programming app, fairy lights, that is advertised as 'will work on 12 volt'.
Top answer 1 of 5
1
There are different strips that accept 5V, 12V, and even 24V. A USB powered (5v) strip will die when powered with 12V. Here is a link to some Step-Down Voltage Regulators https://www.pololu.com/category/131/step-down-voltage-regulators Admittedly, the strips (when I turn them to the white color) start fading to yellow 3/4's of the way down the strip. This is lack of supply voltage because of current through thin strips. Keep in mind you need to look at thicker wires, https://www.powerstream.com/Wire_Size.htm
2 of 5
1
Those will blow if you put 12v to them. They can take around 6v without going out but even that is pushing it. You can get a 12v to 5v step down converter or just a cigarette lighter to usb to get 5v. If 5v power is drooping at the end of the strip, then you can inject an additional 5v supply at the other end of the strip. If it’s a separate power source at the other end, then you can cut the positive in the middle and keep ground and data tied together, and it will work. If it’s all one supply point you can just connect + at multiple points along the strip, such as the beginning and end of the strip. i.e the strip starts at the dome, travels in a big loop and ends back at the dome, you can hook up the 5v to both ends and it should help with dimming. Careful with the number of amps you are pulling through your dome light!!
Reddit
reddit.com › r/led › recommendations for usb led strips for cars
r/led on Reddit: recommendations for usb led strips for cars
December 30, 2024 -
looking to line the roof of my car with a led strip, right now I'm using a led light tube for putting into the dash it burnt out(and looked jank anyways). so does anyone know a good led strip that has a silicone cover that diffuses the light well? I cant exactly hide it behind anything so I don't want hotspots
MICTUNING
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Upgr
Price $59.90
eBay
ebay.com › ebay motors › parts & accessories › car & truck parts & accessories › lighting & lamps › light bulbs & leds
USB Interior Car Lights | eBay
4x RGB 72 LED USB Car Interior Floor Atmosphere Light Strips Bluetooth Phone APPOpens in a new window or tab
Amazon
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amazon.com › Uniwit-Multicolor-Interior-Underdash-Including › dp › B06XKKHW6B
Amazon.com: Car LED Strip Light,Uniwit 4 Pieces DC 12V Multicolor Car Interior Music Light LED Underdash Lighting Kit with Sound Active Function and Wireless Remote Control Including Car Charger : Automotive
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Amazon
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Amazon
amazon.com › Car-LED-Strip-Light-Accessories › dp › B0DRVFGM86
Amazon.com: Wuyaoyao Car LED Strip Light, 12V 24 LED Vehicle Interior Atmosphere Lamps with USB Port, Auto Under Dash Ambient Night Light, Universal Car Accessories (Blue, USB) : Automotive
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eBay
ebay.com › home & garden › lamps, lighting & ceiling fans › lighting parts
USB RGB Led light strip for Cars Inside car Lighting interior Glow control | eBay
USB RGB Led light strip for Cars Inside car Lighting interior Glow control
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Price $12.79
Nilight
nilight.com › home › car interior led strip lights
Car Interior Led Strip Lights - Nilight
72Leds RGBIC USB Interior Light Strip APP RF Remote Control 4PCS · ★★★★★ · (70) $39.99 · Unit price / Unavailable · Previous Next · 60 Leds Interior White Light Kits · ★★★★★ · (16) $16.99 · Unit price / Unavailable · Previous Next ·
Etsy
etsy.com › market › usb_led_strip
Usb Led Strip - Etsy
Discover unique USB LED strips to illuminate any space. Explore ambient car lighting, aesthetic wall decor, and practical sewing machine lights.
Amazon
amazon.com › FSTURIOS-Car-LED-Strip-Light › dp › B0F26JNZK6
Amazon.com: FSTURIOS Car LED Strip Light, 12V 24 LEDs RGB Under Dash Ambient Night Light, USB Port Interior Neon LED Strip Lights, Universal Atmosphere Lamp Decorative Strip for Car Truck SUV (Blue) : Automotive
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Reddit
reddit.com › r/cars › what usb powered led lights for the interior of the car are recommended?
r/cars on Reddit: What USB powered led lights for the interior of the car are recommended?
July 6, 2020 -
I’m looking to buy one of those ambient/mood led lights for my car. Everything I find is one that you plug into the cig lighter.
Any of you know of a good one that is usb powered, has an app and a remote??
Amazon
amazon.com › Yourkar-Car-LED-Strip-Light › dp › B0D4YZ8YFN
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eBay
ebay.com › ebay motors › parts & accessories › car & truck parts & accessories › lighting & lamps › light bulbs & leds
Interior Car Lights USB Car LED Strip Lights Car Ambient Lighting Kit with 23... | eBay
Interior Car Lights USB Car LED Strip Lights Car Ambient Lighting Kit with 23...
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Price $32.06