Gy-85 IMU

Fig. 1: Inertial measurement Unit GY-85

Autor:	Syed Muhammad Abis Rizvi
Sprache:	DE EN

Introduction

Overview:

The GY-85 is a compact 9-axis inertial measurement unit (IMU) which is the combination of three on board sensors.

1. Gyroscope — ITG3205

It measures angular velocity (rotation speed)

Axes: X, Y, Z

Result : °/second

2. Accelerometer — ADXL345

It measures tilt and acceleration.

Axes: X,Y,Z

Able to identify:

movement due to gravity (tilt)

Beneficial for: motion detection and balance

3. Magnetometer — (HMC5883L / IST8310 variant) It determines the magnetic field of Earth

provides a heading for the compass (North)

Interference-sensitive

Chips:

ITG3205 (3-axis gyroscope) ADXL345 (3-axis accelerometer) HMC5883L (3-axis digital compass) - IST8310 from 01.03.2020

Technical data:

IIC communication protocol Built-in regulator and logic converter to support 3.3V/5.0V microcontrollers I2C Digital Interface Module size: 22mm * 16.8mm Mounting hole 3mm 2.54 mm standard pin interface, convenient bread plate experiment connection Scope of delivery:

1x GY-85 (ITG3205 ADXL345 HMC5883L/IST8310) Nine Axis Modules 2x Pin Header

Technical Overview

Feature	Specification
Hersteller	Goouu
NEO-6M-0-001
Spannungsversorgung	VCC 3-5 V
Stromaufnahme	30-50 mA
Temperaturbereich	-40 bis +85 °C
Empfohlene Baudrate	Default 9600 Baud (variabel 4800 … 230400)
GNSS-System	GPS (L1-Band, 1575,42 MHz)
Positionsgenauigkeit	typ. 2,5 m CEP unter freiem Himmel
Geschwindigkeitsgenauigkeit	0,1 m/s
Zeitgenauigkeit	ca. ±30 ns
Time to First Fix (TTFF)	Kaltstart: 27–30 s Warmstart: 25 s Hotstart: 1 s

Pin Assignment

Pin	GY-85	Signal	Arduino Uno R3
1	S: Signal	Analogsignal (0.3 V .. 5 V)	VCC 5 V
2	+: Versorgungsspannung VCC	5 V
3	-: Masse (GND)	0 V

Software

Arduino IDE

Demo: DEMO GY-85.zip

Datasheets

Data Sheet

Related Links

• HX711 based weight scale

SVN-Repository

https://svn.hshl.de/svn/HSHL_Projekte/trunk/Arduino_Sensorsammlung