Product Description
Send a PWM (pulse width modulation) signal from a drone to perform various functions via the HDMI connector on a Mapir Survey3 camera. Cables are available in lengths of 20 or 50cm and for single or dual camera operation.
The cameras are triggered by differing PWM signals:
- 1000us is a neutral, do not do anything level.
- 2000us pulse trigger the camera shutter (take a photo)
- 1500us pulse width to have the camera enter USB Media Transfer mode.
If the camera is connected to a computer using the USB/POWER/FPV port, when in transfer mode the camera’s SD memory card will then become mounted to the computer and you can access it as if the SD card was plugged into the memory card reader on your computer. This is very useful if using a companion computer on a drone as it is possible to extract the images from the camera and onto the computer’s memory. Then you can do anything you want, such as process the photos or store them onto an external memory stick or SSD to easily take the photos off your drone.
| Cable Lengths | Single 20cm (STANDARD other options available) Dual 20cm (two camera version) Single 50cm (one camera version) Dual 50cm (two camera version) |
| HDMI Connection | HDMI Micro Connector |
| White Wire | PWM Pulse Signal |
| Red Wire | +5V Power Out (Optional) |
| Black Wire | Ground – |
MAPIR Survey3 cameras can be triggered by differing PWM (pulse width modulation) signals:
- 1000us is a neutral, do not do anything level.
- 1500us pulse width to have the camera enter USB Media Transfer mode.
- 2000us pulse trigger the camera shutter (take a photo)
With Survey3 cameras you can send a 1500us pulse width to have the camera enter USB Media Transfer Mode. If the camera is connected to a computer using the USB/POWER/FPV port, when in Transfer Mode the camera’s SD memory card will then become mounted to the computer and you can access it as if the SD card was plugged into the memory card reader on your computer. This is very useful if using a companion computer on a drone as it is possible to extract the images from the camera and onto the computer’s memory. Then you can do anything you want, such as process the photos or store them onto an external memory stick or SSD to easily take the photos off your drone.
The diagram below shows the HDMI pins that are connected and the required PWM pulse to send depending on the function you want to perform.
| Active HDMI Pins | Mapir Survey3 Camera | Mapir Survey 2 Camera |
| PIN 2 White Wire | PWM Signal | PWM Signal |
| PIN 4 Black wire | Ground | Ground |
| PIN 19 Red wire | + 5 V Power Out | + 5 V Power Out |
| PWM Signal Value | ||
| Level 0 1000 us | Do Nothing / Neutral | Do Nothing / Neutral |
| Level 1 1500 us | Enter / Exit USB Transfer | |
| Level 2 2000 us | Photo Capture | Photo Capture |
Use on-bord computer to trigger the camera
Dual cable help to lighten the drone payload
Ideal for multispectral aerial mapping and survey applications
PWM cable
