Responsible Person(s)
Designer: Neel Bullywon Kevin Song
Principle Objective:
Design custom navigation lights that can be attached to a drone
Requirements:
Surface Mount Non Addressable
Handle up to 5V
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:
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
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