NT Camera
Since firmware version v2.04e, NT camera modules are supported.
The NT camera module allows to remote control a camera. It thus serves a similar purpose as the various RC camera remote control modules, such as CAMremote, CamCntrl, IR Remote Shutter Controller, and all the others. Instead of listening to a servo PWM signal however, it listens to the data on the NT bus. It is thus usually connected to the NT bus near the camera NT IMU module, which yields extremely slim wiring schemes (see here). The camera remote control is associated with the IR Camera Control function in the [Functions] tab.
In addition, the NT camera module also acts as a "PWM out" module. That is, it outputs an additional servo PWM signal, which is an exact mirror of the PWM output signal available on the STorM32 board (when set up accordingly). This PWM signal is associated with the Pwm Out Control function in the [Functions] tab.
Dedicated NT camera hardware has not yet emerged, but the NT camera function is integrated into the NT IMU firmware. This means that those NT IMU modules which expose extra pins can simultaneously be used also as NT camera modules. Specifically this are the "big" v1.x NT IMU module and the CC3D Atom based modules.
NT Camera Support by NT IMU Modules
In v2.05e, three NT camera related signals are available at the EXT port pins of NT IMU modules, namely:
- pin EXT-3: IR Camera standard servo PWM signal (with ca. 60 Hz frequency)
- pin EXT-2: IR Camera pulse, 50 ms off/on/off
- pin EXT-1: Pwm Out standard servo PWM signal (with ca. 60 Hz frequency)
The two "IR Camera" signals are determined by the settings related to the IR Camera Control function; see also Advanced Functions: IR Camera Remote Control. The "Pwm Out" signal is affected by the settings for the Pwm Out Control function, see Advanced Functions: Pwm Out. For hardware reasons the NT IMU modules cannot drive IR LEDs, and this remote control option is thus not available with them.
The IR Camera PWM signal could directly feed cameras, which can be triggered by such signals, such as the Gitup Git2 or Foxeer Legend 1, or could be connected to a standard RC camera remote control module, such as those mentioned in the introduction.
The IR Camera pulse signal can be used for all sorts of purposes. For instance, it could be connected to a semiconductor relais to drive an IR LED, or to shorten some pins on a USB remote.
The pin assignment on the v1.x NT IMU and the CC3D Atom modules is as follows:
Gitup Git2
General Remote Operation
The GIT2 as the ability to receive a PWM signal via its Micro HDMI port from your receiver to control video recording and photo triggering. As to the specifics they can be found on the Gitup Site but in general a 3 position switch will be used on your transmitter. The middle position will be setup up as 1500µs and will do nothing. Low position, < 1250µs, will start recording video when switched. High position, >1800µs, will take one photo when switched. If your channel is setup as 0%, 50%, 100% for Low, Mid, and high you should be fine.
Cable Information
Gitup does have a Remote Shutter cable available. If you choose to make your own please follow the pinouts for the Micro HDMI, not Mini or full size because they are different.
- Signal In- Micro HDMI Pin 2 (Usually marked as Utility or Reserved on a pin out)
- Signal Gnd- Micro HDMI Pin 4 (Marked as TMDS Data2 Shield, or any other shield pin. Even the connector case works)
Just as a note, the Git2 uses its Mini USB port for both Video Out and power in to charge or power the camera. While Gitup also provides this cable the FPV Cable made for the GoPro works as well. At the time of this writing Gitup is working on a combo board / cable which will contain both the HDMI and USB connectors.
NT Camera IMU, STorm32 and Git2 Integration
Note: This section will be based on the use of the Mini CC3D Atom and has been tested. Other NT camera IMU's should be similar.
- http://www.gitup.com/en/blog/22_Git2-Remote-Shutter-for-FPV.html
- http://www.rcgroups.com/forums/showpost.php?p=34538383&postcount=3443
Foxeer Legend 1
To be filled.
RunCam 2
To be filled.
CAMremote
To be filled.