# 2. Hardware

This page is about hardware specific details. For general information, refer to the 1. General page., for software related details please refer DroneCAN interface.

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drawing drawing drawing
drawing drawing

# Features

  • 32 RBG LEDs
  • Powered by a wide range of voltages

# Wire

Schematic features. Schematic can be provided via issue.

Connectors

The node has connectors which are described in the table below.

N Connector Description
1 CAN1 5 V power up CAN bus connector
2 CAN2, CAN3 6-30 V power up CAN bus connector
3 SWD1 STM32 firmware updating using programmer-sniffer

Here (opens new window) you can find manufacturer part number of connectors it self and its mates.

# 2.1 Pin configuration and functions

Pin N CAN1 Pin N CAN2,CAN3 Pin N SWD1
1 5V 1 Vin 1 GND
2 CAN_H 2 Vin 2 SWLK
3 CAN_L 3 CAN_H 3 SWDIO
4 GND 4 CAN_L 4 3.3
5 GND 5
6 GND 6

Here you can see all connections of device.

pinout

You can find configured file for MCU in lights-v2-software (opens new window) repo. MCU pinout can pe represented as picture and table below.

MCU pinout
MCU PIN PIN Numer NET Name Description
PB1 16 VERSION
PA14 28 SWLK
PA13 25 SWDIO
PB7 34 SDA Airspeed
PB6 33 SCL Airspeed
OSC_OUT/PD1 3 OSC_OUT
OSC_IN/PD0 2 OSC_IN
PA15/JTDI 29 INTERNAL_LED_RED Internal
PA4 11 INTERNAL_LED_BLUE Internal
PA8 20 INTERNAL_LED_BLUE Internal
PA2 9 WS2812B_RGB_LED LEDs contorol
PA12 24 CAN_TXD
PA11 23 CAN_RXD
PA0-WKUP 7 ADC_VIN
PA1 8 ADC_5V

# 2.2 Specifications

Mechanical

Scheme is shown on the picture below. CAN model can be provided via email request or issue on github or downloaded on GrabCAD (opens new window) (opens new window).

drawing
Width, mm Length, mm Height, mm
Outline 71.5 39.5 9.6
PCB 71.5 39.5 1.6

Total weight of device is 16.1 g.

# Housing

Information about case is not presented.

# Absolute Maximum Ratings

Parameter MIN MAX UNIT
Vin (HV) 5.5 55* V
V (LV) 4.5 5.5 V
I max 1.0 A
Operating temperature

*Noted Voltage should be delivered only with current limitation under 2.5 Amp.

Parameter Value UNIT
Vin (HV) 30 V
V (LV) 5 V
I max @ 30V 0.260 A

# ESD ratings

Description Value UNIT
Human-body model (HBM) 2000 V
Charged-device model (CDM) 500 V

# MTFF

Not presented for now.

# 2.3 Integration

Recommended mechanical mounting

There are no specific recommendations. However, in general the navigation lights should be placed at the very end of each wing and tail.

drawing

Connection example diagram

To display the status of the autopilot, this board should be connected to one of the autopilot's CAN ports.

drawing

Alternatively, this device can be connected to Sniffer and controlled manually from the GUI tool.

drawing

# Power Supply Recommendations

Device is designed to operate from an input voltage supply range between 4.5 V and 5.5 V over CAN1 connector, or 5.5 - 30 V from CAN2,3. This input supply must be able to withstand the maximum input current and maintain a stable voltage. The resistance of the input supply rail should be low enough that an input current transient does not cause a high enough drop that can cause a false UVLO fault triggering and system reset. The amount of bulk capacitance is not critical, but a 47-uF or 100-uF electrolytic capacitor is a typical choice.

# 2.4 Revision history

View Version Date Description
drawing v2.2 (opens new window) Oct 15, 2023 RGB led for status indication added
drawing v2.0 (opens new window) Nov 21, 2022 32 LEDs instad of 16
drawing v1.1 (opens new window)