Navigation Lights

Owned by Neel Bullywon
Last updated: 2022-03-23
3 min read

 

Responsible Person(s)

  • Designer: @Neel Bullywon @Kevin Song

Principle Objective:

  • Design custom navigation lights that can be attached to a drone

Requirements:

  1. Surface Mount Non Addressable

  2. Handle up to 5V

  3. TBD

https://docs.google.com/spreadsheets/d/1rQ15cULHvpWA7JbSKxMaMTKfRuIcg4_okoWHp6thIQM/edit?usp=sharing

Goals:

 

What we need: Voltage Regulator, Non-adressable LED strip, diodes

Finding Components:

Option 1: https://www.digikey.ca/en/products/detail/inspired-led,-llc/12V-MB-CW-12M/5866510?utm_adgroup=LED%20Lighting%20-%20COBs%2C%20Engines%2C%20Modules&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Product_Optoelectronics&utm_term=&productid=5866510&gclid=Cj0KCQiAybaRBhDtARIsAIEG3klGHjHAsND7ZonsMTr5sUk7mRA5dQNZL0cQsck6gkzRwindBAF8jnMaAhWJEALw_wcB

 

Product Features:  

  • Size 2835 diodes , 0.33” between each LED  8mm flex, cut points available every 1” (3 LEDs)  

  • Available in custom pre-cut lengths or full 12m reels  Class 2 DC plug-in connectors (3.5 x 1.3 mm) or screw terminal end connectors available  

  • Adhesive backing mounts to almost any flat surface 

  • Minimal heat production, no IR or UV output  

  • Dimmable with compatible systems  Rated to last up to 100,000 hours  CSA C22.2 No. 250.0-08/ANSI/ UL Standard 1598, 8750  

  • To be installed in accordance with NEC, using Class 2 12V DC power supply!

 

Option 2: https://www.digikey.ca/en/products/detail/inspired-led-llc/12V-SB-RGB-5M/9091794 

Product Features:  

  • Color changing 5050 RGB diodes  

  • Custom lengths or 12 meter reels  Low profile design (10 mm x 2mm)  

  • Minimal heat production- no IR or UV light  

  • Adhesive mounts to almost any flat surface  

  • European Union CE, RoHS compliant  

  • To be used with compatible 12V 4-conductor RGB products


Non Addressable SMD LED Options: 

Voltage Regulator Options:

NOT USED: Diode Options: 

Final Choices:

Calculations:

  • Resistors:

    • Power Supply Voltage Range: 5V

      Forward Voltage: 3.3V

      Desired LED Current: 15mA

      Resistance= (Power Supply V - Forward Voltage)/Desired LED Current

      • R=(5V-3.3V)/(15mA)=113.34 Ohms

      • With 100 Ohm Resistor: I=(5V-3.3V)/100= 17mA Max mA=20mA

Job File (With Screenshots)

 

PCB (2D):

Top Layer:

Bottom Layer:

PCB (3D):

Gerber File Preview:

Timeline:

  • March 13 2022, researching components needed for the led strip

  • March 15 2022, agreed to use option 2, calculated LED resistance and found smd resistors. Finalized part selection for the project, awaiting response from EE Leads.

  • March 19 2022, had meeting with EE team lead and finalized schematic

  • March 20 2022, small revisions and generated gerber files for production