Changes between Version 15 and Version 16 of Other/Summer/2023/Latency


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Timestamp:
Aug 8, 2023, 4:05:54 PM (11 months ago)
Author:
sclarke53
Comment:

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  • Other/Summer/2023/Latency

    v15 v16  
    1414== Project Design
    1515Our camera and LED light is sealed in a box with minimal light. The camera is continuously recording to capture the LED light turning on and off.
     16
     17The Time Machine is equipped with a GPS and uses PPS (Pulse Per Second) and PTP (Precision TIme Protocol). PPS sends a precise voltage that turns the LED light on at the start of every second.
    1618[[Image(https://cdn.discordapp.com/attachments/840223980811714590/1138500481149313065/camera_diagram_resized.png)]]
    1719
    1820As the camera streams footage to our computer, we can save the incoming video packets through a software called TCPDUMP. These packets contain the data for the captured camera video. When the LED light turns on, the data inside the transmitting video packets will change, indicating that light is now being captured.
    1921
    20 The Time Machine is equipped with a GPS, and uses PPS (Pulse Per Second) and PTP (Precision TIme Protocol). PPS sends a precise voltage that turns the LED light on at the start of every second.
    2122
    2223The GPS in the device gives a standard source of time. PTP uses this time to timestamp packets with the time the computer receives them, and to sync all the local clocks on our computer network to the GPS standard time.