IMX-070

Pyroelectric Infrared Sensor Evaluation Board:IMX-070, IMX-060 Quick Start Guide 1 1 murata.com Copyright © Murata Manufacturing Co., Ltd. All rights reserved. Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017 19 June 2017 Pyroelectric infrared Sensor Evaluation Board: IMX-070, IMX-060 • It's a Evaluation Board to know how Pyroelectric Infrared Sensor(IRA-S210ST01) working and performance. – Specifications • Rated Voltage : 3.3V • Output signal : analog, comparator • Dimension : 48×30mm Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017 2 Quick Start Guide : Pyroelectric Infrared Sensor Every objects emit IR(=Infra-Red) ray in respond to its temperature. Pyroelectric Infrared Sensor detects "change" of IR distribution within its sensing area. * sensing area is determined by lens design. Pyroelectric Infrared Sensor Amplifier and comparator circuits on evaluation board amplifies sensor’s output signal and generate digital High/Low signal. (Next page) Amplifier & Comparator Circuit (Please make sure lens is attached on board.) Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017 3 Hardware Operation While there's no IR distribution change, AOUT is 1.65V and COUT is HIGH(=3.3V). When it detects that, AOUT varies and once AOUT crosses threshold, COUT falls to LOW(=0V). AOUT In the sample code, we detect this COUT change with GPIO external interruption and IRQ handler sets a flag which is periodically monitored in main loop.(Next page) COUT Infra-Red AMP PIR AOUT Comparators (window comparator) Copyright © Murata Manufacturing Co., Ltd. All rights reserved. COUT (H/L) 19 June 2017 4 Software Operation : Sample Code Flow Chart Measurement Start f_PIR == true Interruption Handling NO F_PIR = true YES Display “IR change detected!!” Done F_PIR = false Wait 100ms Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017 5 Pin Connection Pin connection to each CPU board is also instructed in sample code. Evaluation board  Arduino UNO VCC 3.3V GND GND COUT D2 AOUT A0 Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017 6