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by riklaunim
Tue Nov 11, 2014 10:26 pm
Forum: General discussion
Topic: OpenID
Replies: 4
Views: 960

Re: OpenID

OpenID failed and in general was replaced by OAuth.
by riklaunim
Mon Nov 10, 2014 11:42 pm
Forum: Camera board
Topic: long exposure not working on B+
Replies: 123
Views: 29496

Re: long exposure not working on B+

jbeale wrote:You can get almost the same effect already as a true 20 sec. exposure, by taking four 5-second exposures and adding them together.
Not always. 4 frames will only increase SNR by 2x (sqrt). Also if the signal at 5 sec exposure is below noise level it won't work.
by riklaunim
Sat Nov 08, 2014 12:54 am
Forum: General discussion
Topic: Are ARM based computers the future?
Replies: 77
Views: 13526

Re: Are ARM based computers the future?

But still, Intel know how to make CPUs and eventually he will be even dominant player among mobile CPUs. Even right now all Windows 8 (non RT) tablets are based on Bay Trail. And the Core-M is yet another strong competitor among low TDP designs.
by riklaunim
Wed Nov 05, 2014 10:46 pm
Forum: General discussion
Topic: Trouble cross compiling linux kernel on osX
Replies: 3
Views: 1367

Re: Trouble cross compiling linux kernel on osX

Wouldn't it be better to run a Linux OS in vitual machine that would cross-compile to ARM?
by riklaunim
Sun Nov 02, 2014 1:30 pm
Forum: Beginners
Topic: £ Instead of Pound Sign #
Replies: 13
Views: 18296

Re: £ Instead of Pound Sign #

by riklaunim
Sun Nov 02, 2014 2:03 am
Forum: Networking and servers
Topic: Proposal: RPI CM Supercomputer/HA Architecture
Replies: 5
Views: 1660

Re: Proposal: RPI CM Supercomputer/HA Architecture

It may be nice on drawings but also it must be practical. Do you have a use case that would make it worth the money, as well as time-money to develop software that would be able to use such architecture? Nowadays there are GPU "supercomputers" or servers with high computing powers from Intel (like w...
by riklaunim
Sat Nov 01, 2014 8:39 pm
Forum: Other projects
Topic: Is this all i need to connect to an Atrix 4g lapdock?
Replies: 2
Views: 536

Re: Is this all i need to connect to an Atrix 4g lapdock?

In general yes. For more power consuming USB or GPIO devices you may need better external power supply than Atrix power.
by riklaunim
Fri Oct 31, 2014 10:47 pm
Forum: Camera board
Topic: Long exposure imaging for capturing lighting flashes
Replies: 18
Views: 5838

Re: Long exposure imaging for capturing lighting flashes

You don't need long exposures, but just AVI recording and getting out the frames that caught the lightning. I used a webcam that way. Long exposures with noisy and uncooled sensor will just give you very bad resuts. Not to mention that it will easily saturate at X minute exposures when using high ga...
by riklaunim
Mon Oct 27, 2014 5:44 pm
Forum: Off topic discussion
Topic: Fire TV stick with Broadcom SOC
Replies: 7
Views: 2228

Re: Fire TV stick with Broadcom SOC

There is a lot of them, including other stronger ARM Android dongles capable of running Linux (and x86 BayTrails are coming too). The problem is that when you will make a low-quantity development board (like Radxa with RK3188) it will cost more than the consumer mass produced product (RK3188 Android...
by riklaunim
Sun Oct 26, 2014 12:35 pm
Forum: Beginners
Topic: C++ programming about wifi dongle
Replies: 1
Views: 398

Re: C++ programming about wifi dongle

If you want streaming then you need a stream server on RPi. If you want to only sent some frames then maybe HTTP library for POSTing them to an external server with an application that would receive them (web app).
by riklaunim
Thu Oct 23, 2014 5:31 pm
Forum: Camera board
Topic: Mechanical IR-cut out filter for Pi-Noir
Replies: 12
Views: 8513

Re: Mechanical IR-cut out filter for Pi-Noir

In astrophotography with mono sensors I use filter wheels. It goes between the sensor and the lens/telescope. This device you found works in a similar way. Lens compatibility may depend what backfocus you will get from the sensor to the back of the lens (as this device will add some backfocus).
by riklaunim
Wed Oct 22, 2014 4:48 pm
Forum: Beginners
Topic: Calling C programs from python script
Replies: 1
Views: 888

Re: Calling C programs from python script

Did you checked that using C solves the speed problem?

As for calling C using subprocess.call(["./c_program"]) will look for the executable binary in the same folder as the current one. Other option is to create Python bindings to C functions and import/execute them in Python.
by riklaunim
Tue Oct 21, 2014 11:04 pm
Forum: Camera board
Topic: Mechanical IR-cut out filter for Pi-Noir
Replies: 12
Views: 8513

Re: Mechanical IR-cut out filter for Pi-Noir

Quite likely it will require more current than GPIO can provide. You will have to use an external power circuit controlled by Pi via a transistor or one of simple solid state relays (I used LAA110 few times).
by riklaunim
Tue Oct 21, 2014 11:00 pm
Forum: Off topic discussion
Topic: Odroid U3
Replies: 5
Views: 1645

Re: Odroid U3

What does the pi community think of the Odroid u3. Should I go buy one or wait for the Odroid u4? It is oct 21 and it seems that Hard Kernel comes out with a new board each year around the fall. Depends what you need it for. At some point it's to much or to exotic for electronics scripting. For gen...
by riklaunim
Tue Oct 21, 2014 6:20 am
Forum: Beginners
Topic: Can Pi convert Wifi to Bluetooth
Replies: 3
Views: 808

Re: Can Pi convert Wifi to Bluetooth

If you use a Bluetooth dongle then yes.
by riklaunim
Mon Oct 20, 2014 10:46 pm
Forum: Automation, sensing and robotics
Topic: Smart Home System control for B+ by Mobile & PC & Tablet
Replies: 9
Views: 6682

Re: Smart Home System control for B+ by Mobile & PC & Tablet

You could try to simplify/lower the price it by using a microcontroller board and a UART-Ethernet or UART-WiFi board unless you have cheap raspberries. Chinese released a small cheap blue WiFi board lately. WeIO looks nice too, they nicely expose web GUI for the electronics via JS/websockets and HTM...
by riklaunim
Mon Oct 20, 2014 8:47 pm
Forum: HATs and other add-ons
Topic: Processor,Ram and Gpu Upgrade?
Replies: 5
Views: 2554

Re: Processor,Ram and Gpu Upgrade?

Portable gaming PC would be Clevo W110ER (11.6") or newer W230SS (13.3") laptop :)
by riklaunim
Sat Oct 18, 2014 11:47 am
Forum: Other projects
Topic: Pi Tablet
Replies: 2
Views: 606

Re: Pi Tablet

No Android and if you think in commercial terms - will cost more than nowadays modern Chinese tablet. There is already 13.3" Raspberry laptop on Indiegogo and it costs around the same you would have to pay for an entry level decent Bay Trail laptop with Win 8.1 (and Linux if you want to install ther...
by riklaunim
Fri Oct 17, 2014 7:24 am
Forum: General discussion
Topic: Pi Top - Laptop for Raspberry Pi on Indie Go Go
Replies: 3
Views: 561

Re: Pi Top - Laptop for Raspberry Pi on Indie Go Go

$209 + shipping (+ RPi) seems bit high for a laptop where Bay Trail laptops and netbooks are available in that price range. It could be more handy for GPIO prototyping on the Pi, but still I prefer remote programming from an IDE... and I already have Atrix Lapdock.
by riklaunim
Wed Oct 15, 2014 5:06 pm
Forum: General discussion
Topic: Will the RBPi do everything I need it to do?
Replies: 5
Views: 1255

Re: Will the RBPi do everything I need it to do?

There are also Android HDMI dongles that can work as a multimedia players and they can play movies/music from other computers in local network using DLNA/Miracast (those services can also work on RPi).
by riklaunim
Wed Oct 15, 2014 5:01 pm
Forum: General discussion
Topic: Running x86 apps on ARM
Replies: 13
Views: 8153

Re: Running x86 apps on ARM

But even so running x86 on very weak ARM SoC is not a good idea.
by riklaunim
Wed Oct 15, 2014 5:00 pm
Forum: General discussion
Topic: Tiny RFID stickers?
Replies: 4
Views: 1191

Re: Tiny RFID stickers?

Probably only capsule rfid tokens can be that small.
by riklaunim
Fri Oct 03, 2014 5:01 pm
Forum: Off topic discussion
Topic: YOU SUCK: the venting thread
Replies: 948
Views: 165780

Re: YOU SUCK: the venting thread

M$ fan-bois who think people on a Raspberry Pi forum are in terested in what they think about M$'s latest press release. Well in some countries or schools (high education) in computer science Java and Microsoft technologies are very popular. In Poland we are trying to get Python in which isn't easy...
by riklaunim
Fri Oct 03, 2014 4:48 pm
Forum: Beginners
Topic: how do I connect to MySql on Rpi from Windows?
Replies: 2
Views: 471

Re: how do I connect to MySql on Rpi from Windows?

Host would be the IP address of Raspberry Pi. If you still can't connect check mysql server settings and change it so that not only localhost can connect to it.

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