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Thread: Optical/Photocell (TTL Pulse) to trigger a mocap system

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  1. #1
    Join Date
    Jan 2011

    Optical/Photocell (TTL Pulse) to trigger a mocap system

    I have a request and now seeking sources to enable a customer to trigger a mocap system (Qualisys in this case) using an optical eye. The trigger needs to generate a TTL +/- 5v signal. The QTM software can then utilize this pulse to Start, Start/Stop, or Stop the data collection.

    If anyone has sources or experiences please let me know.

    Dan India
    Daniel India, VP Americas
    Qualisys North America, Inc.
    1603 Barclay Blvd
    Buffalo Grove, IL 60089 USA


  2. #2

    Re: Optical/Photocell (TTL Pulse) to trigger a mocap system

    That is a simple analog circuit to build for less than 15 USD or an easy job for an Arduino or a Raspberry Pi connected up to a photocell to accomplish digitally for less than 40. There are large internet communities that will describe how to build either project. Alternatively, perhaps you could modify a garage door photocell safety sensor system to get the voltage you need like this product

    - Ed Morra -

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