Table of Contents

Photodiode

The Harp Behavior Photodiode is a light-measuring peripheral for the Behavior board. It outputs either an analog signal of the light intensity or a thresholded digital pulse, for instance to detect stimulus onsets on a screen. Refer to the connections article to set up the peripheral and the Acquire Analog Data or Read Digital Inputs articles to read its output in Bonsai.

Photodiode

Key Features

  • Onboard photodiode.
  • Jumper setting to switch between analog output (ANA) or digital output (DIG).
  • Adjustment screw to set the threshold for digital output.
  • Powered from the Behavior board's 5 V supply.

Specs

  • Photodiode: Advanced Photonix PDB-C156-ND
  • Connector: 3.5 mm stereo jack for stereo plug cable carrying 5 V, ground, and signal wire

Hardware

Version Compatible Behavior Board Notes
2.3 > 1.0
  • Initial version

Assembled units are available from the Open Ephys store.


Last updated with:
Hardware v2.1
Firmware v3.3
Bonsai Package v0.2

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