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Ryobi Automatic Emergency Light: Step-By-Step How-To

Ryobi Automatic Emergency Light: Step-By-Step How-To

Video by BenjaminNelson via YouTube
Ryobi Automatic Emergency Light: Step-By-Step How-To

Today, we’ll show you step-by-step how to build a light that turns on automatically when the power goes out!
Please click SHOW MORE!

This is a project to use existing power-tool batteries I already have to create a light which turns on automatically during power-outages. It can also be turned on manually to simply use it as a flashlight.

Blog post with lots more details!

Ryobi Automatic Emergency Light

The LED light is one designed to run on a range of DC voltage inputs, including 12 and 24VDC. That’s perfect for our 18V Ryobi Battery.

STL files:

Parts List –
LED Light:
ON/OFF/ON Switch:
1/4" Spade Quick Disconnects:
DC Input Jack:
Keystone 209 Clip (Ryobi Battery Contact):
Any low-power 12V DC Power Adapter, for example:
Just make sure the size of the power adapter matches the DC input jack.

Also needed:
Soldering iron, solder, 18 AWG stranded wire, wire stripper, wire crimper.

This project was printed on an Ender 3 S1 3D Printer:

The 3D print is a modification of a project by Thingiverse user "toeonly"
Which was originally based on a Ryobi Soldering Station by JeffWDH:

The power meter I was using to show wattage is a "Kill-a-Watt" style, but a different brand name. I like it because it holds energy usage info after being removed from wall power:

This is just a quick look at this project. There will be an upcoming full step-by-step "How-To" Video soon!

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Music by:
"Late Night Radio" Kevin MacLeod (
Licensed under Creative Commons: By Attribution 3.0 License

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