The LOUDENER r/flashlight (>4000m range)

https://www.reddit.com/r/flashlight/s/vfhdbyM7Dg Reddit link to project above. Welcome to the LOUDENER, a rediculously pocketable thrower flashlight project! Specs (approx): - 3000 lumen (SFT-42R / 3V10A buck driver)

- 4.2 million candela equal to 4100m ANSI throw (2.55miles)

- Convoy C8+ or M21A modification

BOM: - Convoy C8+ or M21A (preferably with a round emitter)

- Printed cone and press-fit retaining ring (preferably PETG)

- Fresnel lens Diameter = 230mm, Focal length = 190mm

- 3 Rubber O-rings (I used 32mm ID, 3.55mm thickness)

- Matte black paint

Instructions: - Print the cone and retaining ring

- Paint the inside of the cone matte black (PETG is inherently shiny)

- Mount D= 230mm F= 190mm fresnel lens inside cone and press fit retaining ring

- Carefully remove the bezel AND reflector of the C8+/M21A

- Mount 3 O-rings inside the 3 "heatsink" notches of the C8+/M21A's head

- Slide cone over the O-rings.

- Adjust beam convergence by sliding the cone up/down (shouldn't take much, best done outside)

Info: - The lens can be found on alie.xpress. Make sure it's the right size and focal length.

- The O-rings do not need to be the exact size, just make sure it's a tight but adjustable fit.

- You can use whatever emitter and driver you want, but square emitters will give a square beam.

- When removing the bezel, use some painters tape on top of the hole of the reflector to prevent dust ingress while storing it.

WARNING: this is not a toy, be responsible!