Navigation Lights

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: 

• https://www.digikey.ca/en/products/detail/adafruit-industries-llc/4492/11569136?utm_adgroup=General&utm_source=google&utm_medium=cpc&utm_campaign=Smart%20Shopping_Product_Zombie%20SKUS&utm_term=&productid=11569136&gclid=Cj0KCQiAybaRBhDtARIsAIEG3km2SuIrJsH1AKEORmMeJByITyMUmQ5sjySpcJPjcA6iFdzk3gMyoVwaArjfEALw_wcB

• https://www.digikey.ca/en/products/detail/kingbright/APL3015QBC-D-F01/2263570

• https://www.digikey.ca/en/products/detail/osram-opto-semiconductors-inc./LS%2520L296-P2Q2-1-Z/1938928?utm_adgroup=LED%20Indication%20-%20Discrete&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Product_Optoelectronics&utm_term=&productid=1938928&gclid=Cj0KCQiAybaRBhDtARIsAIEG3knoEQ99eJIh7GvO0UxXG76IFiescwVqyoYdnPnsu1xSFA8-GXG5bMEaAmYXEALw_wcB

Voltage Regulator Options:

• https://www.digikey.ca/en/products/detail/semtech-corporation/SC338AIMSTRT/969447?s=N4IgjCBcpgTA7FUBjKAzAhgGwM4FMAaEAeygG0RYAWATiqoA4QBdIgBwBcoQBlDgJwCWAOwDmIAL5EAtAFYkIVJEy5CJcpRYTtQA 

• https://ww1.microchip.com/downloads/en/DeviceDoc/mic5159.pdf 

• https://www.digikey.ca/en/products/detail/texas-instruments/LFC789D25CDR/668547 

Diode Options: 

• https://www.digikey.ca/en/products/detail/diodes-incorporated/S1BB-13-F/814403

• https://www.digikey.ca/en/products/detail/diodes-incorporated/S1B-13-F/725026

• https://www.digikey.ca/en/products/detail/vishay-general-semiconductor-diodes-division/B140-E3-61T/2149673

Final Choices:

• LED Strip

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

  • Features: RGB, Surface Mount, 12V Forward Voltage

• LEDS

  • https://www.digikey.ca/en/products/detail/kingbright/APL3015QBC-D-F01/2263570

  • Features: RGB, Discrete, VDD Range (+3.3V ~ +5.5V)

• -Voltage Regulator-

  • -https://www.digikey.ca/en/products/detail/texas-instruments/LFC789D25CDR/668536-

  • -Features: VIN (9V ~16V), 2 outputs-

• Resistors

  • https://www.digikey.ca/en/products/detail/stackpole-electronics-inc/CSR0603JKR100/6270656

  • Features: 100 Ohm Resistors, Tolerance 5%

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