Data Sheet

biosignalsplux
User Manual
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3.1.9 Light (LUX)
Figure 37: Light sensor.
A common need when working with biosignals is the synchronization of the recorded
data with external sources (e.g. a computer screen for visual evoked potentials). If applied
to the computer screen, our LUX sensor can be used to detect chromatic changes in the
stimuli, hence providing a synchronization source. The LUX sensor can also be useful for
optical synchronization with third-party devices (provided that the third-party device can
trigger an LED), in applications where it is important to have electrical decoupling
between devices.
How to connect your sensor to your biosignalsplux
The biosignalsplux light sensor can be connected to any of the available analog inputs of
your biosignalsplux device (see 2.3.2 Analog Inputs)
This sensor does not require an additional reference electrode.
How to configure your sensor in OpenSignals (r)evolution
Note, that the signal you are acquiring with this light sensor is affected by the ambient
light and other light sources that are available at your experiment setup. Therefore, it is
needed to adjust the acquired signal to fit to your application and setup.
For this, open the OpenSignals (r)evolution device manager and select the device you have
your light sensor connected to. Select the channel of your light sensor and select CUSTOM
from the dropdown menu (click on the arrow in the channel’s field that appears when you
hover over the channel’s field). In the custom field of your channel, adjust the GAIN and
OFFSET that fits best to your application. Testing and readjustments of this parameters
might be needed to find the configuration that fits best your needs.