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Raspberry Pi plethysmograph Instructions

Raspberry Pi plethysmograph Instructions. Szeged, 2013. Available devices. These methods are not only available on the Raspberry Pi, but also on PC The same, platform independent software can be used on the Raspberry Pi and PC. Prepare the Raspberry Pi.

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Raspberry Pi plethysmograph Instructions

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  1. Raspberry Pi plethysmographInstructions Szeged, 2013

  2. Available devices • These methods are not only available on the Raspberry Pi, but also on PC • The same, platform independent software can be used on the Raspberry Pi and PC

  3. Prepare the Raspberry Pi • Install the Raspbian Wheezy hard float build on the Raspberry Pi • Help for the installation: http://javafx.steveonjava.com/javafx-on-raspberry-pi-3-easy-steps/ • Install Java and JavaFX • An early access, which is capable for the Raspberry Pi can be found at http://jdk8.java.net/ • Help for the installation: http://javafx.steveonjava.com/javafx-on-raspberry-pi-3-easy-steps/

  4. Assembling the measurement circuitAmplitude modulation • Build this circuit on any kind of protoboard

  5. Assembling the measurement circuitFrequency modulation • Build this circuit on any kind of protoboard

  6. Connecting together • Connect the Raspberry Pi, the external sound card and the measurement circuit • It is not suggested to get the 5 V power supply (the USB B connector on the photos above) from the USB port of the Raspberry Pi Aplitude modulation block diagram Frequency modulation block diagram

  7. Download the software • Download the executable jar, the opt.txt and the mixer_select.txt files from … • Place them into the same directory

  8. Options • The options of the program are in the opt.txt file • In the first row the type of modulation can be set, it is AM for amplitude, and FM for frequency modulation • The best value of refresh rate is 1.0 on the Raspberry Pi

  9. Mixer select • The mixer_select.txt file contains only one number, the index of the mixer will be used to play the modulating signal in case of amplitude modulation • It depends on, which speaker port will be used • We used 2 on the Raspberry Pi • On PC the most commonvalue is 1

  10. Run the program • To start the software, write into the terminal: sudo /opt/jdk1.8.0/bin/java -Djavafx.platform=eglfb -cp /opt/jdk1.8.0/jre/lib/jfxrt.jar:/home/pi/PletPi/PletPi_final.jar PletFX.PletPi • Instead of /home/pi/PletPiwrite the path of the folder, where the jar file is placed

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