In this video I build a bat signal from a lensed flashlight beam. This design can be used to project any image, or simply act as a spotlight.The flashlight that is being used for this video is quite powerful and one might think that it wouldn’t be entirely practical.
source/image: NightHawkInLight
For the light source I’m using the Imalent MS18 flashlight, which you can check out here (this is not a paid endorsement, but I was sent the flashlight for free to use in this project.
NightHawkInLight covers the project in two separate videos. In the second video, Ben also shows us how we can replicate the same effect at home using items we may already own. Items like a regular normal-person flashlight, a magnifying glass, and an empty Pringles tube.
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In this video I test my DIY bat signal powered by the incredibly bright Imalent MS18 flashlight against the clouds.
I also show an easy way that you can build your own image projector using a few common items. This is a great project to learn the basics of how lenses work, and can be used to build your own mini bat signal!
