OLcontest, modified light: 20cm fresnel lens thrower

You know, somehow I missed this entire entry - lord knows how. It is amazing. Personally I am not going to be happy until I see a BLF logo in that thrower lol! (kidding of course)
fantastic work, well beyond anything i could muster! Good luck!

Cool :+1:

Regards Xandre

Awesome build, Djozz! :beer:
I’m thinking about numerous images to be projected using that flashlight.

I like it ! :+1:

Haha that little viral addition takes the cake :smiley:

Looks great!

I love how ‘simple’ it is on the inside! Very clean build. :+1:

There is even no driver, the battery is wired directly to the led. I was contemplating building in a fuse for safety but that would cost current, I fear too much.

Fantastic build

A sort video from the balcony without the virus stencil to show it is a zoomie. My 10yr son is the camera man so it is shaky, and the focusing of the my phone is a bit lousy but you get an idea. The big trees are at 30 meter, the very end of the square is 125 meter, the square is no match for 4.2 Mcd.

I bet he’s proud of his Dad! :+1:

Well, he already takes his dad’s weird hobby with a grain of salt I’m afraid, no unreserved admiration :expressionless: . But he does like this one!

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Great Video :sunglasses: , it brings your light to life. :+1:
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Uau, I hadn’t seen the final version, this is uber cool :sunglasses:
Liked the name of the build too! Beware, you foolish virus :smiling_imp:

Well done :wink:

Cool
What about rubber feet to not scratch the bottom?

And a a handlebar mount for the bicycle ?

So that you can light up where you are going to be in five minutes time :sunglasses:

Very well done, djozz. Awesome build and finish. :sunglasses:

That zoom function looks very interesting in your video. The different stencils are ingenious. That virus or the spider is going to freak out everyone who sees it. :smiling_imp:

I liked your build so much that I ordered myself a big fresnel lens. Never imagined what cool things can be done with this. 4.2 Mcd should throw incredibly far. :open_mouth:

“Meet the Vir-O-blast C19”

This is my kind of humor :wink: Really great build!

I just wanted to thank you for this build and the fresnel lens link. I’ve ordered a few sizes to try out and I think this will really scratch my thrower itch. Who knows, one of the lenses could even end up in the next OL contest…

:+1: Me too!

Nice! I have two findings for these plastic fresnel lenses:

1) the focal distance should not be much shorter than the lens diameter (maybe a focal distance equal to the diameter, as I used in the viroblaster is close to optimal), otherwise the the edges of the lens makes such a bad image that it is wasted for forming a good focal image and throw is ruined.

2) their imaging is pretty good but not good enough for very small light sources: it makes a mess of my LEP flashlight (stock lens removed) and I’m not sure that a White Flat will produce a good image (bad image=bad throw). I could test that btw one of these days.