Changes between Version 15 and Version 16 of Other/Summer/2023/Latency
- Timestamp:
- Aug 8, 2023, 4:05:54 PM (16 months ago)
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Other/Summer/2023/Latency
v15 v16 14 14 == Project Design 15 15 Our 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 17 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. 16 18 [[Image(https://cdn.discordapp.com/attachments/840223980811714590/1138500481149313065/camera_diagram_resized.png)]] 17 19 18 20 As 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. 19 21 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.21 22 22 23 The 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.