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I am doing a project of automation in which I want to check if an object is OK or NOT by using a USB webcam.
So I am using a proximity sensor to detect if object is in front of the webcam. If it is there, I want to send a signal to the webcam to capture an image via Arduino Uno. How do I do that?
After capturing the image, data will be saved and processed in the Arduino. How do I do the webcam & Arduino interfacing?
Typically, you would use the proximity sensor to continuously read values and in case there is a change, the Arduino can send a signal over the serial port.
On the computer side, you can read from the serial port and trigger the webcam using a script.
In Python, it is possible using the PySerial module and it is easy to link Python scripts to a webcam to take pictures. Read an example here.
(You should do some more research on this. There are already a lot of solutions out there to trigger using sensors. See this one for high speed photography: http://www.glacialwanderer.com/hobbyrobotics/?p=11)
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I know that usb packets have a very specific format, but I would like to write those packets my self, I know that usb_control_msg is kind of an interface to control packets, but this function is already responsible from sending the setup_token, in/out token, and probably checks ACKS. How could I construct these packets myself and then sending them?
Seems like that what you want is to write your own usb host driver. I suggest you to try analyse existing usb host drivers (ehci/xhci) and then try to write your own driver, but be aware of this that this is not easy task to do. Notice also that it is not possible to exist more that one driver for given usb host controller (ehci/xhci). If you really want to do those things you need to know perfectly both: USB protocol and ehci/xhci specification which may take a lot of time. Also strong experience in writing Linux drivers is required. As I said it is not easy task.
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Is it possible to autonomously command a DJI Matrice, using an NVIDIA TX2 hooked up to a 3G/4G USB modem, to fly without an intervening remote controller?
Theoretically yes.
You will need to:
1/ Add an Onboard computer. My suggestion is a Nvidia TX2 with an orbitty carrier board.
2/ Build an OnboardSDK app with the aircraft controls you want.
3/ Build a communication protocol through 3G/4G and a client/server architecture to send the commands you want to your onboard app.
M100 i have dont support flying without a remote controller.
M100 is only used on turned-on remote controller.
if the remote controller is not powered, M100 is blinking yellow light, then go to failsafe mode.
These drones have a each controller and make a pair set with a remote controller.
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I'm trying to create a "virtual monitor" in Windows (XP & newer). For example, let's say my desktop looks like this:
I want to add a monitor virtually so it looks like this without any change in hardware:
How do I do this? Do I add a virtual driver? Or trick Windows into thinking there is new hardware?
Well, once upon I was in same problem and someone reccomended to me to override EDID data.
The EDID (Extended display identification data) data structure have all the info of your graphic card and other video sources.
You can see a tutorial for how modify EDID here.
The tutorial only applies to Win 7, Win server 2008 and Win Vista...
I don't try the following because I'm a bit afraid of manipulating these data, but... if you're average in these stuff you could try ;)
If you prefer a hardware solution, perhaps DVI Detective may help you. In his website they claim that DVI "provides a virtual EDID". Also, this hardware protects the EDID data, so, there's lower risk to do very much damage...
Hope this helps :)
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i have a idea that i want to store audio of what i play in my system. like i listen some audio and want to store them as audio in my system are their any software exist to store them.
my means to store audio using a software then they can store audio what i play in my system. example youtube , vimeo video i play and software store audio for them. sometime when i am unable to store them in my system. i can store their audio shadow.
Are their any software exist
Total Recorder
Capture any sound played by a computer (including streaming audio, Internet telephony, and PC games), and use the included time shift-feature for off-hours recording.
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Hi basically I am lost in apples documentation and not sure where to start on this.
I need to record the audio from applications running on my system, similar to audio hijack and wiretap studio pro, but I am unsure where to start with the audio captuer. I see reference to quicktime capture documentation but it is not clear how to acheive what I require.
Ideally I want to be able to modify audio in/out from an application such as skype to record and manipulate (think novelty voice effects).
Any pointers where in the documentation I can look, or how to start with this?
I think you should take a look at the Jack OS X source.
It has a CoreAudio user space driver that allows you to send any application's sound output to Jack OS X and support for audio plugins.