# 2. Hardware

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

View Top Bottom
drawing drawing drawing

# 2.1. Features

Main specifications:

  • sensor: MS4525DO airspeed sensor
  • input voltage: 2S-6S
  • connectors: UCANPHY Micro (JST-GH 4), 6-pin Molex, SWD
  • LxWxH: 26x32x14 mm
  • Weight: 8 g

# 2.2. Wire

Schematic can be provided via e-mail request or issue on github.


Connector Description
1 UCANPHY Micro (JST-GH 4) Devices that deliver power to the bus are required to provide 4.9–5.5 V on the bus power line, 5.0 V nominal. Devices that are powered from the bus should expect 4.0–5.5 V on the bus power line. The current shall not exceed 1 A per connector.
2 6-pin Molex (502585-0670 (opens new window), 502578-0600 (opens new window)) Contacts support up to 100 V, 2 A per contact. But the board may work only with 2S-6S.
3 SWD STM32 firmware updating using programmer-sniffer.

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

Pin configuration and functions

1 Vin 1 5V in GND
2 Vin 2 CAN High SWCLK
3 CAN High 3 CAN Low SWDIO
4 CAN Low 4 GND 3.3V

# 2.3. Specifications


Scheme is shown on the picture below.


Width, mm Length, mm Height, mm
Outline 25.3 31.7 16.6
PCB 25.3 31.7 1.6

Total weight of device is 8 g.

You can download 3D model on GrabCAD (opens new window)


Information about case presented here.

Absolute Maximum Ratings

Parameter MIN MAX UNIT
Vin (CAN1) 5.5 55* V
V (CAN2, CAN3) 4.5 5.5 V
I max A
Operating temperature

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

Recommended operating conditions

Parameter Value UNIT
Vin (CAN3) 30 V
V (CAN1, CAN2) 5 V
I max A

ESD ratings

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

# 2.4. Description

Functional Block Diagram

Connection example diagram

# 2.5. Power Supply Recommendations

Device is designed to operate from an input voltage supply range between 4.5 V and 5.5 V over CAN2 or CAN3 connector, or 5.5 - 30 V from CAN1. 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-μF or 100-μF electrolytic capacitor is a typical choice.

# 2.6. Revision history

View Version Date Description
drawing v2.3.2 (opens new window) Oct 11, 2022 Schematic changed to mount SMT vesion of MS4525DO
v2.0 (opens new window) Jun 15, 2021 New design
drawing v1.3 (opens new window) Sep 13, 2021 1 LED, 1 MOLEX Con, 1 JST Con, New mechanical design
v0.1 (opens new window) Jan 21, 2021 Legacy