# Bo-Katan LED Headband ## Overview https://youtu.be/Jf7QQod3aT4 Build a 3D printed LED headband inspired by Bo Katan from Star Wars. This design features engraved details that wrap around the headband and uses an adjustable elastic strap to fit comfortably over a person's head. ![3d_printing_hero-wide.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/864/medium640/3d_printing_hero-wide.jpg?1683558487) ![3d_printing_hero-bin.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/865/medium640/3d_printing_hero-bin.jpg?1683558565) The LEDs are powered by a coin cell breakout board hidden inside a 3D printed battery box on the end of the elastic strap. These miniature LEDs come in a few different colors and they come pre-wired so they’re great for prop builders and model-makers. The Adafruit coin cell breakout features an on/off slide switch, header pins and mounting holes for securing to your projects.   ![3d_printing_hero-coincell.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/868/medium640/3d_printing_hero-coincell.jpg?1683558619) ![3d_printing_hero-led.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/869/medium640/3d_printing_hero-led.jpg?1683558667) ## Parts ![](https://cdn-learn.adafruit.com/assets/assets/000/120/871/medium800/3d_printing_parts.jpg?1683559048) ### Miniature Wired LEDs - 0805 SMT LED - Purple - 5 pack [Miniature Wired LEDs - 0805 SMT LED - Purple - 5 pack](https://www.adafruit.com/product/5491) These ultra-fine wired LEDs are designed for model-makers and crafters but they could also come in handy for folks who want to add tiny points of light to a design without needing SMT-level soldering skills. Use this five-pack bundle of  **Miniature Wired 0805...** In Stock [Buy Now](https://www.adafruit.com/product/5491) [Related Guides to the Product](https://learn.adafruit.com/products/5491/guides) ![Video of a five mini wired LEDs emitting Purple light against a white open palm.](https://cdn-shop.adafruit.com/product-videos/640x480/5491-03.jpg) ### Miniature Wired LEDs - 0805 SMT LED - Pink - 5 pack [Miniature Wired LEDs - 0805 SMT LED - Pink - 5 pack](https://www.adafruit.com/product/5488) These ultra-fine wired LEDs are designed for model-makers and crafters but they could also come in handy for folks who want to add tiny points of light to a design without needing SMT-level soldering skills. Use this five-pack bundle of  **Miniature Wired 0805...** In Stock [Buy Now](https://www.adafruit.com/product/5488) [Related Guides to the Product](https://learn.adafruit.com/products/5488/guides) ![Video of a five mini wired LEDs emitting pink light against a white open palm.](https://cdn-shop.adafruit.com/product-videos/640x480/5488-03.jpg) ### 20mm Coin Cell Breakout w/On-Off Switch (CR2032) [20mm Coin Cell Breakout w/On-Off Switch (CR2032)](https://www.adafruit.com/product/1871) Simple but effective - this sewable breakout board has a CR2032 coin cell battery holder soldered on, an on/off switch and 0.1" pitch breakout pins for easy connecting. Great for powering very low-current projects, or adding a battery backup circuit to a real-time-clock or similar.... In Stock [Buy Now](https://www.adafruit.com/product/1871) [Related Guides to the Product](https://learn.adafruit.com/products/1871/guides) ![Angled shot of a 20mm Coin Cell Breakout Board w/ On-Off Switch.](https://cdn-shop.adafruit.com/640x480/1871-08.jpg) ### CR2032 Lithium Coin Cell Battery [CR2032 Lithium Coin Cell Battery](https://www.adafruit.com/product/654) A perfect match for our [sew-able coin cell holder](http://www.adafruit.com/products/653). This non-rechargeable coin cell is CR2032 sized: 20mm diameter, 3.2mm thick. It has a nominal voltage output of 3V (although it starts a little high at 3.2V and slowly drifts down to 2.5V as... In Stock [Buy Now](https://www.adafruit.com/product/654) [Related Guides to the Product](https://learn.adafruit.com/products/654/guides) ![Front shot of CR2032 Lithium Coin Cell Battery upright.](https://cdn-shop.adafruit.com/640x480/654-02.jpg) ### Part: M2.5x6mm Screws quantity: 4 M2.5x6mm Screws ### Part: Elastic band 1.5" wide quantity: 1 Elastic band 1.5" wide ### Part: Pinch Crimp Ends quantity: 2 Pinch Crimp Ends ## Tools & Supplies - Hot Glue & Hot Glue Gun - Needle & Thread - Hobby Knife - Scissors - Screwdriver  - Soldering Iron & Solder ![](https://cdn-learn.adafruit.com/assets/assets/000/120/883/medium800/3d_printing_hero-wide-show.jpg?1683564984) ![](https://cdn-learn.adafruit.com/assets/assets/000/120/886/medium800/3d_printing_hero-head.jpg?1683591323) # Bo-Katan LED Headband ## 3D Printing ## Parts List The STL files for 3D printing are oriented to print "as-is" on FDM style machines. Parts are designed to 3D print without any support material. Original design source files may be downloaded using the links below. ![3d_printing_3d-parts.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/875/medium640/3d_printing_3d-parts.jpg?1683560617) [Download CAD source](https://cdn-learn.adafruit.com/assets/assets/000/120/896/original/CAD.zip?1683637114) [View Design in Browser](https://a360.co/44DLZgY) [Download STLs](https://www.thingiverse.com/thing:6017304) ## Slice with Settings for PLA Material  The parts were sliced using CURA with the slice settings below. - PLA filament 220c extruder - 0.2 layer height - 10% gyroid infill - 60mm/s print speed - 60c heated bed - Brim line count 6 (bo-katan-band) ![3d_printing_slice.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/876/medium640/3d_printing_slice.jpg?1683560830) ## Design Source Files The project assembly was designed in Fusion 360. This can be downloaded in different formats like STEP, STL and more. Electronic components like Adafruit's boards, displays, connectors and more can be downloaded from the [Adafruit CAD parts GitHub Repo](https://github.com/adafruit/Adafruit_CAD_Parts/tree/main/1871%20CR2032%20Breakout%20Switch). ![3d_printing_1871_CR2032_Breakout_Switch.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/897/medium640/3d_printing_1871_CR2032_Breakout_Switch.jpg?1683637304) ![](https://cdn-learn.adafruit.com/assets/assets/000/120/884/medium800/3d_printing_3d-parts-b.jpg?1683565337) # Bo-Katan LED Headband ## Circuit Diagram The wiring diagram below provides a visual reference for connecting the components. It is not true to scale, it is just meant to be used as reference. This diagram was created using the [Fritzing software package](http://fritzing.org/download/). Take a moment to review the components in the circuit diagram. This illustration is meant for referencing wired connections - the length of wire, position and size of components are not exact.  ![](https://cdn-learn.adafruit.com/assets/assets/000/120/873/medium800/3d_printing_circuit-diagram.jpg?1683559311) Solder the blue wires to the ground pin and the red wires to the switch's power pin. **SW** connects to **Red** wires **Gnd** connects to **Blue ** wires # Bo-Katan LED Headband ## Assemble ## Thread LEDs Pass the wires through the channel and out of the holes on the sides of the headband part. Carefully bend the wires to angle the LEDs. ##   ## Glue Diffuser The wired LEDs are threaded through the built-in recesses and hot glued in place to create a diffuser.   ![3d_printing_thread-led.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/850/medium640/3d_printing_thread-led.jpg?1683557177) ![3d_printing_hot-glue.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/851/medium640/3d_printing_hot-glue.jpg?1683557265) ## Trim Glue Once it’s cooled down you can use a hobby knife to carefully trim away the excess and square it up so it looks nice and clean. ![3d_printing_hot-glue-glow.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/852/medium640/3d_printing_hot-glue-glow.jpg?1683557440) ## Elastic Band Measure and cut a strip of an elastic band to fit your head. Use metal Pinch Crimp Ends and fit through the slits on the headband.  ## Attach Case The strap can then be threaded through the battery case. ![3d_printing_band-ends.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/853/medium640/3d_printing_band-ends.jpg?1683557508) ![3d_printing_case-attach.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/854/medium640/3d_printing_case-attach.jpg?1683557700) ## Mount Board Align the board to the standoffs. Secure with M2.5x6mm screws. ## Add coin cell Attach a CR2032 coin cell battery and test the circuit using the on/off switch.   ![3d_printing_case-board-attach.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/855/medium640/3d_printing_case-board-attach.jpg?1683557766) ![3d_printing_cell-add.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/856/medium640/3d_printing_cell-add.jpg?1683557810) ## Assemble switch  The button actuator press fits into the top cover and gives you much better access to the breakout boards slide switch.   ![3d_printing_switch-align.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/857/medium640/3d_printing_switch-align.jpg?1683557880) ![3d_printing_switch-attach.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/858/medium640/3d_printing_switch-attach.jpg?1683557913) ## Attach Lid Snap fit the cover onto the case with the LED wires inserted through the built-in slit on the side.   ##     ![3d_printing_lid-attach.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/861/medium640/3d_printing_lid-attach.jpg?1683558283) ![3d_printing_wire-pass.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/862/medium640/3d_printing_wire-pass.jpg?1683558321) ## Hide wires The wires are hidden behind the elastic strap and sewed in place with a few stitches. ![3d_printing_wire-hide.jpg](https://cdn-learn.adafruit.com/assets/assets/000/120/863/medium640/3d_printing_wire-hide.jpg?1683558362) ## Complete ![](https://cdn-learn.adafruit.com/assets/assets/000/120/879/medium800/3d_printing_hero-head-wide.jpg?1683564248) ![](https://cdn-learn.adafruit.com/assets/assets/000/120/885/medium800/3d_printing_hero-coke.jpg?1683591224) ## Featured Products ### Miniature Wired LEDs - 0805 SMT LED - Purple - 5 pack [Miniature Wired LEDs - 0805 SMT LED - Purple - 5 pack](https://www.adafruit.com/product/5491) These ultra-fine wired LEDs are designed for model-makers and crafters but they could also come in handy for folks who want to add tiny points of light to a design without needing SMT-level soldering skills. Use this five-pack bundle of  **Miniature Wired 0805...** In Stock [Buy Now](https://www.adafruit.com/product/5491) [Related Guides to the Product](https://learn.adafruit.com/products/5491/guides) ### Miniature Wired LEDs - 0805 SMT LED - Pink - 5 pack [Miniature Wired LEDs - 0805 SMT LED - Pink - 5 pack](https://www.adafruit.com/product/5488) These ultra-fine wired LEDs are designed for model-makers and crafters but they could also come in handy for folks who want to add tiny points of light to a design without needing SMT-level soldering skills. Use this five-pack bundle of  **Miniature Wired 0805...** In Stock [Buy Now](https://www.adafruit.com/product/5488) [Related Guides to the Product](https://learn.adafruit.com/products/5488/guides) ### 20mm Coin Cell Breakout w/On-Off Switch (CR2032) [20mm Coin Cell Breakout w/On-Off Switch (CR2032)](https://www.adafruit.com/product/1871) Simple but effective - this sewable breakout board has a CR2032 coin cell battery holder soldered on, an on/off switch and 0.1" pitch breakout pins for easy connecting. Great for powering very low-current projects, or adding a battery backup circuit to a real-time-clock or similar.... In Stock [Buy Now](https://www.adafruit.com/product/1871) [Related Guides to the Product](https://learn.adafruit.com/products/1871/guides) ### CR2032 Lithium Coin Cell Battery [CR2032 Lithium Coin Cell Battery](https://www.adafruit.com/product/654) A perfect match for our [sew-able coin cell holder](http://www.adafruit.com/products/653). This non-rechargeable coin cell is CR2032 sized: 20mm diameter, 3.2mm thick. It has a nominal voltage output of 3V (although it starts a little high at 3.2V and slowly drifts down to 2.5V as... In Stock [Buy Now](https://www.adafruit.com/product/654) [Related Guides to the Product](https://learn.adafruit.com/products/654/guides) ## Related Guides - [Glowing Birthday Number Crown](https://learn.adafruit.com/glowing-birthday-number-crown.md) - [LED Sequin Bow Tie](https://learn.adafruit.com/led-sequin-bowtie.md) - [Machine Learning with Marshmallows and Tiny Sorter](https://learn.adafruit.com/machine-learning-with-marshmallows-and-tiny-sorter.md) - [LED Eye Prosthetic](https://learn.adafruit.com/led-eye-prosthetic-tutorial.md) - [Moana Glowing Heart of Te Fiti Necklace](https://learn.adafruit.com/moana-glowing-heart-of-te-fiti-necklace.md) - [LEGO Set Lighting](https://learn.adafruit.com/lego-set-lighting.md) - [Battery Powering Wearable Electronics](https://learn.adafruit.com/battery-powering-wearable-electronics.md) - [Light Up your Costume with Noods](https://learn.adafruit.com/light-up-your-costume-with-noods.md) - [Glowing Hair Flowers with n00ds](https://learn.adafruit.com/glowing-hair-flowers-with-n00ds.md) - [LED Masquerade Masks with n00ds](https://learn.adafruit.com/led-masquerade-masks-with-n00ds.md) - [Controlling Devices with RFID Wiz](https://learn.adafruit.com/controlling-devices-with-rfid-wiz.md) - [DIY Quiz Show Controller System](https://learn.adafruit.com/quiz-show-controller-keyboard-bluetooth.md) - [3D Printed Unicorn Horn](https://learn.adafruit.com/3d-printed-unicorn-horn.md) - [FLORA Sensors](https://learn.adafruit.com/flora-sensors.md) - [Muse Headset Teardown](https://learn.adafruit.com/muse-headset-teardown.md)