v0.3.2

Description

• Restructured files and folders into defined versions.
• Removed ability to change gain or actinic intensity through code. Will return in the future but in its current form it was too unstable.
• Use files under the "v0.3" folder as this represents the stable release.

Note

• More changes to firmware to come to account for the changes made to the detection and excitation circuitry.

v0.3.1

Description

• Restructured files and folders into defined versions. Use version 0.3 as this is the current stable release.
• Added further information about the device gain (sensitivity)
• Changed the firmware to make it easier to setup and change the saturation pulse length

v0.3

Electronics:

• Dynamically adjust sensitivity of detection (four levels) using a CMOS switch
• Dynamically adjust actinic brightness (four levels) using a CMOS switch
• LED's can now be swapped easily with a screw terminal

Models:

• Magnetic LID for cuvette housing
• Improved fit of device into 3D printed architecture
• Removed filter slot as it is not needed anymore

Firmware:

• New firmware that can read at a maximum rate of 2.5 μs per acquisition
• Added wave acquisition type measurements
• Reformatted code into individual classes based on their use

Software:

1. Plotting of experimental values is now done through plotly
2. Settings can be changed from within python scripts
3. Data is now captured as a .csv

Other:

1. Updated the user manual
2. New logo

v0.2.3

Minor additions and alterations:

• Updated 3D model with new LED cover and Lid for the MainFrame
• Updated BOM to include some missing minor components
• Updated Readme documentation

v0.2.2

Minor additions and alterations:

1. Added the ability to calculate basic chlorophyll fluorescence parameters from the serial monitor
2. Improved the readability of the Teensy.ino program
3. Added comments the Teensy.ino program
4. Adjusted the README.md file to document these changes

Open-JIP v0.2.1

Minor Fixes:

• Change gerber format from .pdf to .gbr for proper exporting to PCB manufacturers
• Updated some spelling in the README.md file and added a list of specifications

Open-JIP v0.2

This release utilises the same circuitry as used in a recent publication with Open-JIP configured as a flow-through fluorometer. There are a number of changes to the form and functions of Open-JIP that improve both its reliability and its accuracy.

Updates are as follows:

1. Teensy microcontroller - for increased memory size (longer acquisitions) and increased speeds (more data points during the fast rise of chlorophyll fluorescence).
2. Circuit board re-design - surface mounted (SMD) components and new amplifier/actinic circuitry.
3. Integrated mirrors - to direct emitted photons to the detector.
4. New 3D-printed case - no glue needed but can be added to improve robustness. Provides a steady platform upon which measurements can be taken.
5. Improved documentation - should allow new users to feel comfortable creating the device from scratch.

Open-JIP v0.1

The original open-soruce arduino based chlorophyll fluorometer as featured in "A guide to Open-JIP, a low-cost open-source chlorophyll fluorometer."
DOI: 10.1007/s11120-019-00673-2