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Messages - pstest

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Chronos User Discussion / 5V TTL triggering circuit
« on: April 11, 2018, 01:44:54 PM »
Can the forum provide a circuit schematic or description for an external 5V TTL triggering circuit that has been I/F'ed between camera and PC?
If a S/W approach is available, please advise?

2
The event may have been brief if using Triggering Exposure where pulse duration is 1/frame rate.
Check the frequency of your TTL signal so < frame rate.

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Chronos User Discussion / Re: transfer video to computer via code
« on: April 11, 2018, 01:38:01 PM »
David,
Can you also provide me with the script that monitors card for file update and then transfers file through network to PC?
Thank you,
pstest

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Chronos User Discussion / Re: SDXC Card
« on: October 27, 2017, 07:29:33 PM »
Save settings is not recognizing the SDXC 128 GB Class 10 SanDisk card inserted into adapter and then into camera SD card drive slot.  SDXC card is FAT32 formatted.
Any advice appreciated?
.


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General high-speed discussion / Re: Measuring Speed
« on: October 22, 2017, 08:31:35 PM »
cheap and dirty way to make a checkered fiducial backdrop is in MS Excel - Choose the cell size desired. Blacken cell A1 and then every other cell in that column  go to column B and blacken cell B2 and then every other cell int hat column - repeat until you have a grid - size the grid for your application and print as many copies required to complete your backdrop -  glue the printed grids to a piece of cardboard required for your backdrop - measure distance of camera lens to backdrop. 

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Chronos User Discussion / Re: external trigger
« on: October 21, 2017, 07:26:16 AM »
Thank you,
Do these triggers provide method to  "Start" recording? - not overly concerned with "Stopping" recording but need to provide the camera triggering "Start" signal  on the same timeline as signal that is provided which starts the event to be video recorded. Pause in the execution of the recorded event "start" signal can be conducted to compensate for camera triggering delay. I believe the camera recording delay is 10nsec which may be negligible in the recorded event time duration of interest.


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Chronos User Discussion / Re: external trigger
« on: October 20, 2017, 05:34:27 PM »
Thanks Tesla500
Mechanical rotation events have an inherent inertial and frictional delay after the event "start" command signal is executed.  The time or frame at which the motion command input signal is executed must be known Without a known event start time, there is no basis upon which to determine acceleration/deceleration behavior or capacity to optimize the behavior.  Camera tools exist to delete frames after event is complete.

2 Potential workarounds come to mind:
    1.  Preferred work around: I purchased the switch cable w/push button S/W. 
         Hack the switch leads; connect to computer using opto-coupler FET circuit instructed with
         computer that issues the rotational event motion command signal.  My assumption is, since the
         push button is a continuity interrupt to start recording, electronic switch closure can replace
         the button. the external opto-coupled trigger circuit would have to be developed about
         required electronic parameters & specs. Aspects such as impedance, trigger signal duration, 0-
         6.6V or 5V TTL assumed to be supported?, amperage limits, etc.
         Is KronTech willing to support this effort providing the BNC port electronic parameters to assist
         in development of an opto-coupled triggering circuit?
         This support a digitally integrated test environment.

    2.  Less preferred method - place a visual signal (LED) in the FOV with the LED actuating when
         motion command signal is executed - The manual push button camera triggering would be
         followed by motion command signal execution.  this can be a manual actuation of both the
         push button and motion execution or trigger delay technique which has not been conceived on
         my part at this time.

Another question - how is data stored and retrieved from camera?

Please advise if Krontech can support info-sharing as detailed in #1 above.

Best Regards
pstest

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Chronos User Discussion / external trigger
« on: October 14, 2017, 05:28:52 PM »
will be measuring a rotational device.  Require to trigger camera on/off when the command to start and stop the motion is executed. Duration of mechanical motion is no greater than 400msec. Command signal to execute motion is provided remotely to a processing board/GPIO board which is connected to the remote source via windows OS computer.  camera is also operated through computer which is also controlled remotely from same source that motion command signal is issued.
What is a method to provide trigger to camera when motion command signal is executed as well as stop camera recording when motion command signal is completed.
 

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