Mini LED Neon Rose sign

This mini neon sign is made with LED filament. It has an integrated battery holder and can be hung on a wall.
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updated December 28, 2024

Description

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This cute mini LED neon sign is made to look like a rose. The integrated battery means you can display it anywhere.  You can make it yourself with some simple ingredients. The main pieces are two 300mm 3v LED filaments: LED Filament Flexible DC3V 38mm 60mm 95mm 80mm 130mm 145mm 185mm 260mm 300mm Edison Bulb Lamp Parts COB LED Diode Decorative DIY - AliExpress I chose pink and green as the colors. Other than that all you need is a switch, battery contacts, the CR123A battery, and some wire and heat shrink.

These filaments are available on Amazon as well, however I was not able to find a pink at the time of making this post https://a.co/d/ebBdGNZ 

Parts

 

Other than the LED filaments above, here's what I used:

Negative terminal: https://www.mouser.com/ProductDetail/Keystone-Electronics/5204

Positive terminal: https://www.mouser.com/ProductDetail/534-5226

Switch: https://www.mouser.com/ProductDetail/179-SLW-1276864-4A-D

Or, you can remove the battery terminals from common battery holders (such as those for the CR123A)

Printing

 

I printed this sign with a 0.4mm nozzle at 0.24mm layer height.  Print orientation is front face down on the print bed.

Assembly

 

  1. Insert the two poisitive ends (with small holes) into the two middle holes in the sign.  Allow enough slack to reach the positive terminal.
  2. Press the filament into the depressions, starting at one end and working your way around.  At the end, push the filament down through the holes.  No glue should be needed to keep the filament in place.  If any filaments escape, try to rotate them in the depression so that the wider part of the cross section is wedged in place.
  3. Once all the filament is in, turn the sign over.
  4. Insert the two battery contacts.  In my case, I placed the positive contact (no spring) on the right.
  5. Glue the switch in place (I used super glue)
  6. Solder the positive filament ends to the positive contact.
  7. Solder the negative end of the pink filament to the closest switch leg.
  8. Solder a piece of wire between the farthest filament end and the other negative filament end, on the leg of the switch.
  9. Solder a 10ohm resistor between the negative battery contact and the middle leg of the switch.

And you're done!

This project was inspired by “makerverse”s excellent video using this LED filament.  How to make a Mini Neon Sign with 3D Printing - Tutorial DIY

If you like this project, you may also like my other mini LED sign https://www.printables.com/model/1095428-mini-neon-check-engine-light-sign

 

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