Data Sheet

biosignalsplux
User Manual
!
!
!
87!of!159!
!
4.1.3 Light-Emitting Diode (LED)
Figure 76: LED.
The LED is typically used to provide visual feedback to the user. A common need when
working with biosignals is the synchronization of the recorded data with external
recording devices (e.g. a video camera). If applied to a camera lens, the LED sensor can
be used to introduce common markers in the recording, hence providing a
synchronization source. The LED sensor can also be useful for optical synchronization
with third-party devices (provided that the third-party device has a photo detector), in
applications where it is important to have electrical decoupling between devices.
How to connect your accessory to your biosignalsplux
The LED needs to be connected to the digital port of your device (see 2.3.4 Digital Port).
How to control your LED in OpenSignals (r)evolution
Output devices, such as the LED, do not require to be configured in OpenSignals
(r)evolution. However, it is possible to select their initial state which can later be changed
in the information bar of OpenSignals’ real-time acquisition mode which is located right
below the acquired signals (circle to the right of DIGITAL OUTPUT).
To select an initial state, open the OpenSignals (r)evolution device manager and select the
device you have your LED connected to. In the device’s panel, click on the circle next to
DIGITAL to turn on (blue circle) or off (empty circle) the LED for the start of your signal
acquisition (see Figure 77).