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L.A.M.P - Light Assembly, Minimal Parts - a Keychain flashlight with very few parts! 3D Printer File Image 1
L.A.M.P - Light Assembly, Minimal Parts - a Keychain flashlight with very few parts! 3D Printer File Image 2
L.A.M.P - Light Assembly, Minimal Parts - a Keychain flashlight with very few parts! 3D Printer File Image 3
L.A.M.P - Light Assembly, Minimal Parts - a Keychain flashlight with very few parts! 3D Printer File Image 4
L.A.M.P - Light Assembly, Minimal Parts - a Keychain flashlight with very few parts! 3D Printer File Thumbnail 1
L.A.M.P - Light Assembly, Minimal Parts - a Keychain flashlight with very few parts! 3D Printer File Thumbnail 2
L.A.M.P - Light Assembly, Minimal Parts - a Keychain flashlight with very few parts! 3D Printer File Thumbnail 3
L.A.M.P - Light Assembly, Minimal Parts - a Keychain flashlight with very few parts! 3D Printer File Thumbnail 4

L.A.M.P - Light Assembly, Minimal Parts - a Keychain flashlight with very few parts!

REMLURELMI avatarREMLURELMI

July 20, 2025

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Description

Recommended print settings:

  • Material:  PLA/PETG
  • Layer Height: 0.15 mm or less
  • Infill % : 15+
  • Supports: No
  • Print Orientation: Default as modeled
  • Brim: Optional

 

This model is a simplistic flashlight that can be added to a keychain. A CR2032 battery and 5 mm light emitting diode (LED) are used in the assembly. 

This is an original design, but I was inspired to create it based on some similar designs:

https://www.thingiverse.com/thing:6930181

https://www.thingiverse.com/thing:6887859

https://www.printables.com/model/667566-keychain-led-torch 

 

This design is optimized for 3D printing and modification:

  • no supports are required
  • Flat top and bottom provide good bed adhesion - no brim required.
  • Flat Space is provided for easy addition of a logo or text - See the PrusaSlicer Embossing Tool
  • Prints in 20 minutes at 0.10 layer height.
  • Holes accept M3 threads, but are not threaded (simplicity).

 

Features:

 

 

 

 

Required Parts:

 

Only three non-printed items are required:

ItemType
BatteryCR2032
LED5 mm
Hex cap ScrewM3x5

 

You may need to add a piece of tape on the battery to keep the lead from touching when the button isn't being pressed.

 

 

 

Assembly:

 

  1. Start with the bottom piece - it's the side marked with a + symbol - this is the positive side.
  2. Slide the LED into the slot, with the long lead (anode, a.k.a. positive) on the bottom.
  3. Insert the battery between the LED leads, with the positive side down.
  4. Add tape if required.
  5. Adjust the top lead so that the LED only lights when the end of the cathode (negative) lead is pressed against the battery - this is the most fiddly part of the process, and may take several tries.                                                         
  6. Slide the top piece - with the button gently downward on top of the LED/battery assembly. The LED should light up when the button is pressed, and not light when the button is not pressed.                                  
  7. Insert the M3 cap screws into the top piece, and tighten the threads into the bottom piece. There are no threads in the printed part.
  8. Add a Key Ring. The final assembly should look like this:                                                

 

To operate, press the button:

License:

Creative Commons — Attribution

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