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by technoducky
Sun Dec 22, 2013 11:59 pm
Forum: General discussion
Topic: GPS ALTERNATIVE to Adafruit GPS Ultimate Breakout Board
Replies: 11
Views: 7185

Re: GPS ALTERNATIVE to Adafruit GPS Ultimate Breakout Board

Yes this board will work with 3.3v logic, you should be able to connect this to the Pi in exactly the same was as the Adafruit module and have it work.

The Adafruit module also accepts multiple input voltages, the 3.3v pin is from the output of the regulator.

Dan
by technoducky
Wed Dec 18, 2013 1:04 pm
Forum: General programming discussion
Topic: Monitoring the change of channels/inputs on an HDMI TV
Replies: 2
Views: 1728

Re: Monitoring the change of channels/inputs on an HDMI TV

You could have a look at using a simple IR receiver to pick up any commands which would change the channel/power.
I'n not familiar enough with HDMI to know how this could be done over the HDMI connection alone.

Dan
by technoducky
Wed Dec 18, 2013 1:01 pm
Forum: C/C++
Topic: C++
Replies: 7
Views: 2609

Re: C++

It is not a book but is a very good beginners/reference guide: http://www.learncpp.com/
by technoducky
Tue Oct 22, 2013 7:05 pm
Forum: Graphics, sound and multimedia
Topic: Video Input
Replies: 0
Views: 420

Video Input

I have a project which requires the Pi to accept a composite video input.

Is anyone aware of any USB video input devices which are confirmed to work with the Pi and Video for Linux.

Thanks,
Dan
by technoducky
Thu Sep 19, 2013 12:23 pm
Forum: General programming discussion
Topic: Javascript-HTML5 list?
Replies: 3
Views: 1114

Re: Javascript-HTML5 list?

Since HTML5 and JS actually run on the client, writing it be be served by a Pi will be no different than writing it for a Debian server, unlike most other languages (C, C++, Python, Java) which have Pi specific libraries, etc. for interfacing with the Pi hardware. Personally I don't see why HTML/JS ...
by technoducky
Mon Sep 16, 2013 2:55 pm
Forum: Camera board
Topic: recording length if powered down while recording
Replies: 2
Views: 704

Re: recording length if powered down while recording

Depending on how serious of a project this was you could power the Pi from the accessory bus (which receives power when you turn the key to the first notch after off) and boot on the ignition signal (which gets power when the key is turned to the "on" position, where it usually is when the engine in...
by technoducky
Mon Sep 16, 2013 2:39 pm
Forum: Camera board
Topic: Better FPS
Replies: 6
Views: 1431

Re: Better FPS

I'm not exactly sure where the FPS limitation is (JamesH would likely know).
But I doubt there is any way to greatly improve it, nor do I think anyone is planning to.
You won't be able to simply plug a different camera into the Pi and expect it to work let along give you a higher FPS.
by technoducky
Mon Sep 16, 2013 2:28 pm
Forum: Camera board
Topic: Camera number 3!
Replies: 24
Views: 4933

Re: Camera number 3!

There is always a possibility, especially if two cameras have managed to fail on the same Pi.
A little more info would make finding the problem easier.
by technoducky
Mon Sep 16, 2013 1:14 pm
Forum: General discussion
Topic: Unreliable Unreliable Unreliable
Replies: 81
Views: 12821

Re: Unreliable Unreliable Unreliable

The Pi was never designed to be used in production environments, it is supposed to be an educational tool. If you use it expecting it to be a perfect 100% reliable embedded computing platform then you clearly did not know what you were buying when you bought 12 of them. I would love to see this thr...
by technoducky
Mon Sep 16, 2013 12:21 pm
Forum: General discussion
Topic: Re-streaming a http stream
Replies: 7
Views: 1114

Re: Re-streaming a http stream

cepheusnet wrote:Any idea more?
What have you tried?
by technoducky
Mon Sep 16, 2013 12:14 pm
Forum: General discussion
Topic: Camera Module (Video) In Tkinter ?????
Replies: 15
Views: 12256

Re: Camera Module (Video) In Tkinter ?????

You could also just run an MJPG stream from the camera and have Python read it. And for overlaying a crosshair, I'm sure OpenCV could do that no problem. AFAIK, both those approaches would lead to drastically reduced frame rates. However of course this may actually be acceptable to the OP? ;) Oh ye...
by technoducky
Mon Sep 16, 2013 12:11 pm
Forum: General discussion
Topic: My project...
Replies: 2
Views: 567

Re: My project...

1. I know that screen I chose is used by many Raspberry users, so is it possible to mod it use +5 voltage? There are some projects but they used different screen. I intend to use same USB battery with Raspberry and Screen. It probably can be, but it is probably a pain. 2. Is my battery good for my ...
by technoducky
Mon Sep 16, 2013 11:42 am
Forum: General discussion
Topic: Hot Pi! (A little bit of temperature testing)
Replies: 7
Views: 2248

Re: Hot Pi! (A little bit of temperature testing)

I never understand why people feel they need to put heatsinks and fans on the Pi. The Broadcam IC is designed to run at relatively high temperatures in embedded applications without a heatsink, and the linear regulator would never get particularly hot since it is protected by the ployfuse. In fact b...
by technoducky
Mon Sep 16, 2013 11:31 am
Forum: General discussion
Topic: mjpg-streamer streaming to the internet
Replies: 1
Views: 554

Re: mjpg-streamer streaming to the internet

You have two main options, either run the MJPG server on the Pi and have your network set up to route traffic to the Pi on whatever port you want to use. Or have the Pi upload images to a server and the server is the MJPG streaming server, this method reduces the bandwidth needed to run multiple str...
by technoducky
Mon Sep 16, 2013 10:39 am
Forum: HATs and other add-ons
Topic: PiGlow system monitor
Replies: 1
Views: 2074

Re: PiGlow system monitor

Since metrics that people are interested in vary depending on project, you should take in three arguments which select the metric reported by each of the "legs".
Some metrics I would be interested in: memory usage, SD storage usage, uptime as a percentage of a given length of time.
by technoducky
Fri Sep 13, 2013 12:55 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Serial interface - black magic?
Replies: 34
Views: 7425

Re: Serial interface - black magic?

iond wrote:No flow control anywhere.. Scale doesnt support it.
No I didn't try terminal emulator, but since the same code works when the laptop is on the receiving end of data from the scale I don't think the software is at fault
Never assume anything.
by technoducky
Thu Sep 12, 2013 11:20 am
Forum: General discussion
Topic: Camera Module (Video) In Tkinter ?????
Replies: 15
Views: 12256

Re: Camera Module (Video) In Tkinter ?????

Maybe have a look at having raspivid send output to stdout, other then that you would have to modify the raspivid source code to get communication between your app and raspivid. I have never used the camera module at a high level such as Python before so not sure how easy it is. You could also just ...
by technoducky
Wed Sep 11, 2013 10:29 am
Forum: Camera board
Topic: Underexposed images from camera
Replies: 20
Views: 4609

Re: Underexposed images from camera

I have similar problems with bad exposure control, not necessarily dark frames, but generally having issues setting exposure parameters.
by technoducky
Wed Sep 11, 2013 10:05 am
Forum: Camera board
Topic: RaspiCam image control options
Replies: 1
Views: 565

RaspiCam image control options

I was just wondering if there was anyone who has a definitive list of what image parameters work as they are intended in the RaspiCam apps, I have seen several issues* on the repo about parameters (particularly exposure and metering) which simply don't work or don't do what they are supposed to. I h...
by technoducky
Wed Sep 11, 2013 9:58 am
Forum: Camera board
Topic: Graphical interface for raspistill
Replies: 18
Views: 25410

Re: Graphical interface for raspistill

HI, I am pretty new to all of this so hope you can bear with me. I tried in the terminal: wget https://raw.github.com/sixbacon/RPICameraGUI/master/RPICameraGUI.py then: apt-get install -y python-wxtools Finally I entered in my home directory: python RPiCameraGUI.py But I get this message: python: c...
by technoducky
Wed Sep 11, 2013 9:51 am
Forum: General programming discussion
Topic: Gaming with pygame
Replies: 3
Views: 1035

Re: Gaming with pygame

Some code may help.
by technoducky
Mon Sep 09, 2013 3:40 pm
Forum: General discussion
Topic: Bitcoin mining without other hardware
Replies: 23
Views: 50000

Re: Bitcoin mining without other hardware

The USB devices used to mine bitcoins are what actually does the processing (as even a regular CPU would not be able to do it efficiently), I believe (don't quote me here) they used either an FPGA or ASIC which allows data to be processed very fast but only in a very specific way. So if you can get ...
by technoducky
Mon Sep 09, 2013 12:22 pm
Forum: General discussion
Topic: Unreliable Unreliable Unreliable
Replies: 81
Views: 12821

Re: Unreliable Unreliable Unreliable

How are you shutting them down? I pull the plug. Say no more. Oh wait, I will walk over to each device in turn and plug in a keyboard and display and type shutdown then ? How many embedded devices have you designed? The Pi was never designed to be used in production environments, it is supposed to ...
by technoducky
Fri Sep 06, 2013 9:11 am
Forum: Troubleshooting
Topic: Hot USB socket
Replies: 3
Views: 541

Re: Hot USB socket

It helps if you define "hot", but it is either the WiMax dongle heating the socket through its USB connection, of the network controller on the board heating the socket through the PCB.
In either case it is probably fine.
by technoducky
Fri Sep 06, 2013 8:58 am
Forum: Troubleshooting
Topic: network drops after some time, bug?
Replies: 2
Views: 644

Re: network drops after some time, bug?

I have had a similar problem, however in my case I diagnosed it as a power issue. My Pi was switching a load which was powered from the same supply as the PI (not through the Pi), which I believe caused a voltage drop that affected the network controller but not the BCM, as the Pi kept running but t...

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