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AS3935 Standard Board 

 

ams Demo Kit Manual, Confidential 

Page 14 

[v1-03] 2014-Jul-08 

Document Feedback

 

 

9 

Schematic, Layout and BOM of Lightning Sensor 

9.1  Schematic of Lightning Sensor Demo Board 

Figure 6: Board Schematics of Lightning Sensor Demo Board 

 

 

 

Содержание AS3935

Страница 1: ...Demo Kit Manual DN Document ID ams Demo Kit Manual Confidential Page 1 v1 03 2014 Jul 08 Document Feedback AS3935 Standard Board AS3935 DK ...

Страница 2: ...LEDs 7 4 How to get started with Franklin Lightning Sensor Demo Kit 8 5 GUI Description 9 6 History Description 12 7 Layer Stack of Lightning Sensor 13 8 Layout Recommendations 13 9 Schematic Layout and BOM of Lightning Sensor 14 9 1 Schematic of Lightning Sensor Demo Board 14 9 2 Board Layout of Lightning Sensor Demo Board 15 9 3 Bill of Material of Lightning Sensor Demo Board 16 10 Schematic Lay...

Страница 3: ...ulation of lightning with different distance far close closest and noise generation 1 1 Programmable Lightning Sensor AS3935 Key Features Lightning Sensor warns of lightning storm activity within a radius of 40km Distance estimation to the head of the storm down to 1km Detects both cloud to ground and intra cloud cloud to cloud flashes Embedded man made disturber rejection algorithm Programmable d...

Страница 4: ...n Long Press 1s The statistics of the AS3935 is cleared C IDD IDD Jumper for current measurement of AS3935 D BUZZER Audio Information for Lightning and Disturber E LCD 128x32 Display blue backlight F 500kHz 100uH LF Antenna for AS3935 G AS3935 Lightning Sensor H MCU Microcontroller PIC24FJ64GB002 I AS3935 Interface SPI Interface to AS3935 2 3 Component Description Bottom Label Name Info J USB CONN...

Страница 5: ...rray of capacitors to achieve 500kHz as resonance frequency The resonance frequency and the internal capacitance are shown on the LCD RCOs Calibration After the antenna tuning the internal RC Oscillators are calibrated The SRCO is calibrated to 32kHz and the TRCO is calibrated to 1 1MHz Both frequencies are displayed USB connected The demo board can be connected via USB As soon as the USB bus is c...

Страница 6: ... is jamming the AS3935 AFE during this time the sensor cannot detect the presence of lightning activities Disturber Detected Disturbers have been received by the AS3935 and rejected by the disturber rejection embedded algorithm 2 6 Real Time Clock RTC The demo board has a built in RTC that must be synchronized with a PC Once the RTC is set to the current time it is possible to create timestamps fo...

Страница 7: ...ke Emulates a pattern of a lightning with the closest distance F Antenna The different patterns are modulated on the 500kHz carrier that is transmitted via the LF antenna G On Off Switch Turn both switches to ON to supply the lightning emulator As soon as the demo board is switched on the ON LED flashes up once a second to indicate being turned on H Battery holder CR2450 The Lightning Emulator boa...

Страница 8: ... boards Turn on the AS3935 Lightning Sensor via the ON OFF switch A When you switch on the board you will see on the LCD the austriamicrosystems logo followed by the LCO and the RCO calibration After successful calibration the AS3935 goes into sense mode awaiting a lightning Note The LCO should be tuned to 500 kHz the TRCO to 1 1 MHz and the SRCO to 32 kHz To manually execute the tuning procedures...

Страница 9: ...he AS3935 Lightning Sensor Power Down In power down mode R0 0 1 the entire AS3935 is switched off The typical current consumption is 800nA After power up the TRCO is not calibrated The calibration must be done by the user pressing the button Calibrate RCOs and respectively Calibrate LCO if needed LNA Settings The LNA settings have to be changed according to the location of the lightning sensor out...

Страница 10: ... powering up the demo board the oscillators will not be calibrated The calibration procedure can be executed manually via the GUI The first step is to measure the default resonance frequency of the oscillators by pressing Measure The oscillators will show inaccurate values Pressing Calibrate LCO will tune the antenna to 500 kHz which will then allow the user to calibrate the RCOs by pressing Calib...

Страница 11: ...AS3935 Standard Board ams Demo Kit Manual Confidential Page 11 v1 03 2014 Jul 08 Document Feedback Figure 3 Register Map ...

Страница 12: ...he button B on the Lightning Sensor demo board shows the actual time on the LCD display Note Right after every power up of the board the RTC is set to midnight of 1 January 2012 The history is deleted when the board is turned off Each event detected by the Lightning Sensor is saved into the memory It is possible to read out the history by connecting to the GUI and pressing the button Read History ...

Страница 13: ...ry Export History and Sync RTC and Delete History 7 Layer Stack of Lightning Sensor Figure 5 Layer Stack of PCB PCB Material FR4 1mm for Active Tag FR4 1 6mm for base station 2 layer board Solder surface chemical tin Width of copper 35µm Silk screen top bottom white 8 Layout Recommendations Do not cross the SPI lines with the sensitive inputs of the antenna Below the 500 kHz LF antenna there shoul...

Страница 14: ...ms Demo Kit Manual Confidential Page 14 v1 03 2014 Jul 08 Document Feedback 9 Schematic Layout and BOM of Lightning Sensor 9 1 Schematic of Lightning Sensor Demo Board Figure 6 Board Schematics of Lightning Sensor Demo Board ...

Страница 15: ...AS3935 Standard Board ams Demo Kit Manual Confidential Page 15 v1 03 2014 Jul 08 Document Feedback 9 2 Board Layout of Lightning Sensor Demo Board Figure 7 Top Layer Figure 8 Bottom Layer ...

Страница 16: ...AS3935 Standard Board ams Demo Kit Manual Confidential Page 16 v1 03 2014 Jul 08 Document Feedback 9 3 Bill of Material of Lightning Sensor Demo Board ...

Страница 17: ...Board ams Demo Kit Manual Confidential Page 17 v1 03 2014 Jul 08 Document Feedback 10 Schematic Layout and BOM of Lightning Emulator 10 1 Schematic of Lightning Emulator Figure 9 Board Schematics of Lightning Emulator ...

Страница 18: ...AS3935 Standard Board ams Demo Kit Manual Confidential Page 18 v1 03 2014 Jul 08 Document Feedback 10 2 Board Layout of Lightning Emulator Figure 10 Top Layer Figure 11 Bottom Layer ...

Страница 19: ...AS3935 Standard Board ams Demo Kit Manual Confidential Page 19 v1 03 2014 Jul 08 Document Feedback 10 3 Bill of Material of Lightning Emulator ...

Страница 20: ... online at www ams com ICdirect Technical Support is available at www ams com Technical Support Provide feedback about this document at www ams com Document Feedback For further information and requests e mail us at ams_sales ams com For sales offices distributors and representatives please visit www ams com contact Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria Europe Tel...

Страница 21: ...rect incidental special exemplary or consequential damages arising from the inadequacy of the provided Demo Kits Evaluation Kits and Reference Designs or incurred losses of any kind e g loss of use data or profits or business interruption however caused as a consequence of their use are excluded ams AG shall not be liable to recipient or any third party for any damages including but not limited to...

Страница 22: ...22 v1 03 2014 Jul 08 Document Feedback 13 Revision Information Changes from 1 02 2013 Mar 11 to current revision 1 03 2014 Jul 08 Page Update to corporate format 1 21 Note Page numbers for the previous version may differ from page numbers in the current revision ...

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