pyPhotometry v2.0 board availible from OEPS

[ThomasAkam]

Version 2.0 of the pyPhotometry board is now available for sale from OEPS (link).

Changes from the version 1.0 board are:

• Increased maximum current of 300mA from the two LED driver outputs.

• 2 additional LED control outputs for triggering external LED drivers that require a voltage control signal (0-3.3V) , allowing the board to be used with optical hardware like the Doric Gen3 minicubes which have integrated LED drivers. The signals output on the two LED control outputs are the same signals used to control the on-board LED drivers, so it is not possible to independently use the LED control outputs and the LED driver outputs at the same time.

• Reduced artefacts on analog input signals caused by saturation (i.e. voltage exceeding 3.3V) on the other analog input.

• Additional Picoblade connector providing access to 3 pyboard pins including I2C serial communication. This connector is not used by any currently implemented pyPhotometry functionallity, but makes it easier for users to interface with the pyboard if they want to customise or extend the system's functionallity.

The v2.0 board is compatible with the current v1.0.2 version of the GUI, but when using the current GUI version the LED current output by the board is 3x higher than the value set in the GUI (i.e. setting the LED current in the GUI to 100mA results in a 300mA output from the LED driver). I will release an updated version of the GUI in the next week which allows the pyPhotometry board version to be specified to give correct LED current calibration for both boards.