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by abishur
Fri Feb 06, 2015 4:59 pm
Forum: Media centres
Topic: Media Center Configuration
Replies: 3
Views: 1181

Re: Media Center Configuration

I know I'm coming in late to the conversation, but if you're going to have to purchase some powerline adapters to make this work, let me instead suggest looking into MOCA. (Media Over CoAx) it uses the same technology that cable internet providers use (different Mhz range so no interference) to send...
by abishur
Fri Feb 06, 2015 4:53 pm
Forum: General discussion
Topic: 8 GB SD card space reduced to 2GB OS installtation
Replies: 20
Views: 4828

Re: 8 GB SD card space reduced to 2GB OS installtation

When you write the OS image with win32diskimager it creates an exact(ish) replica of the card it was imaged from. We wanted to have the maximum number of compatible cards so we use the smallest amount of space available to make this image. Or, long story short, there's nothing wrong with your card! ...
by abishur
Fri Feb 06, 2015 4:45 pm
Forum: Off topic discussion
Topic: Fresnel Lenses
Replies: 23
Views: 3940

Re: Fresnel Lenses

In that case I think your arrangement is right, except I don't think you need a second condenser: I've seen some designs where they use the one fresnel lens, but there is some benefit to using the split fresnel design where one acts as a collimator and the other as a condensor, so I opted for that ...
by abishur
Fri Feb 06, 2015 4:03 pm
Forum: Off topic discussion
Topic: Fresnel Lenses
Replies: 23
Views: 3940

Re: Fresnel Lenses

Man, I knew you guys would have the answers! :lol: Let me see if I can answer all the questions But I presume you want some sort of image on the screen. What is producing the image you want projected and where is it in relation to the lens? and If it is then his discussion mentioning screen size is ...
by abishur
Fri Feb 06, 2015 3:44 pm
Forum: General discussion
Topic: Is there any reason why RPi cannot have > 1 ethernet port?
Replies: 22
Views: 3835

Re: Is there any reason why RPi cannot have > 1 ethernet por

@rurwin is 100% correct the USB chip being used, the LAN9514 for the 4 port version of the pi and the LAN 9512 for the two port USB version of the pi, also provides a USB-to-Ethernet adapter. The SoC being used, even on the new model 2 version of the Pi, does not have a built in Ethernet bus which i...
by abishur
Thu Feb 05, 2015 9:32 pm
Forum: Off topic discussion
Topic: Alibaba\aliexpress
Replies: 3
Views: 1529

Alibaba\aliexpress

Has anyone used alibaba or aliexpress? I've heard some rather negative things about them, but are they scam sites or just bad customer service?
by abishur
Thu Feb 05, 2015 9:19 pm
Forum: Off topic discussion
Topic: Fresnel Lenses
Replies: 23
Views: 3940

Re: Fresnel Lenses

W. H. Heydt wrote:For optical calculations, treat the Fresnel lens as a planoconvex (flat on one side, convex on the other) of the specified focal length.
Would it surprise you to know I have no idea how to practically apply that sentence? :lol:
by abishur
Thu Feb 05, 2015 7:39 pm
Forum: Off topic discussion
Topic: Fresnel Lenses
Replies: 23
Views: 3940

Re: Fresnel Lenses

The Fresnel lens takes light being shone behind it at various angles and straightens them out so they are parallel to each other and hit the screen at a 90 degree angle to maximize its efficiency.
by abishur
Thu Feb 05, 2015 7:11 pm
Forum: Off topic discussion
Topic: Fresnel Lenses
Replies: 23
Views: 3940

Fresnel Lenses

I clearly think a lot of the people who post in this forum, I've asked this in a projector forum and got zero responses (it's the busiest forum I could find on projectors and its completely dead), so hopefully I can get a good answer from y'all or a good resource to ask this in instead :lol: I'm hav...
by abishur
Thu Feb 05, 2015 6:28 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SD Card corruption when using i2c
Replies: 1
Views: 499

SD Card corruption when using i2c

I've connected my pi to an Arduino using i2c with a level shifter in the middle (one from sparkfun designed for i2c communications). I know technically that since the Pi is an i2c master that I don't need to worry about an i2c level shifter, but I like to be paranoid like that. Anyways, after safely...
by abishur
Thu Feb 05, 2015 4:41 pm
Forum: Off topic discussion
Topic: Somebody needs a Raspberry PI...
Replies: 13
Views: 1667

Re: Somebody needs a Raspberry PI...

I would very much enjoy seeing a caricature of the pope done up as a dinosaur :lol:

(read the headline of the article if you don't get that statement)
by abishur
Sun Feb 01, 2015 10:05 pm
Forum: Off topic discussion
Topic: Need help understanding actual screen resolutions
Replies: 6
Views: 1026

Re: Need help understanding actual screen resolutions

It sounds like it is an "HD Ready" screen, rather than an actual "HD" screen. It will accept the full 1920x1080 input but will downscale that to fit the physical screen size of 800x480. You know the more I look at it (here's an eBay listing for example http://www.ebay.com/itm/7-TFT-LCD-Display-Modu...
by abishur
Sat Jan 31, 2015 7:45 pm
Forum: Off topic discussion
Topic: Need help understanding actual screen resolutions
Replies: 6
Views: 1026

Re: Need help understanding actual screen resolutions

What about that 800x3(RGB) part? Is it actually an hd screen or is it just marketing mumbo jumbo? Also if someone had used these lcd driver modules, will it accept a 1920x1080 resolution even if the screen can't display that and just down Convert the resolution to match the screen? Or will it only p...
by abishur
Sat Jan 31, 2015 6:21 am
Forum: Off topic discussion
Topic: Need help understanding actual screen resolutions
Replies: 6
Views: 1026

Need help understanding actual screen resolutions

I'm looking for a small LCD screen (and LCD driver module) that can do a true 1920x1080 resolution (yes anything displayed would be small but I haz reasons ;-) ) By small I mean I would prefer nothing larger than 7", but whenever I go looking around I feel like I keep getting fed a load of marketing...
by abishur
Mon Jan 05, 2015 4:38 pm
Forum: C/C++
Topic: Eclipse and WiringPi cross compile
Replies: 1
Views: 1797

Re: Eclipse and WiringPi cross compile

So... I shut down Eclipse and opened it again and it could suddenly find everything. I have no idea why it suddenly started working but I'm not complaining! My guess is the program just needed to be restarted to load everything correctly.
by abishur
Mon Jan 05, 2015 1:53 pm
Forum: C/C++
Topic: Eclipse and WiringPi cross compile
Replies: 1
Views: 1797

Eclipse and WiringPi cross compile

I've setup Eclipse to do cross compiling for the Pi. A basic program works with no problems. I then build wiringPi on the Pi and moved the files to my development computer. It works fine using any function in wiringPi.h, but when I try to use anything else, i.e: #include <wiringPiI2C.h> it will say ...
by abishur
Sun Dec 28, 2014 9:09 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Anyone interested in testing my avrdude with SPI support?
Replies: 23
Views: 8477

Re: Anyone interested in testing my avrdude with SPI support

I've also tried commenting out the communication bit as well as changing it to SPI or serial. No matter what I try the serial port option under tools remains greyed out and com1 remains stubbornly selected! :( It doesn't matter that 'com1' is still selected (but greyed out). You don't want to use t...
by abishur
Sun Dec 28, 2014 9:05 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Anyone interested in testing my avrdude with SPI support?
Replies: 23
Views: 8477

Re: Anyone interested in testing my avrdude with SPI support

Mod Edit: I have merged these two topics because this was the very thing I was discussing in the thread I started.
by abishur
Sun Dec 28, 2014 7:21 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Anyone interested in testing my avrdude with SPI support?
Replies: 23
Views: 8477

SPI programming of Arduino without gertboard

I have a ATMega328p sitting on a breadboard with all the assorted bells/whistles. Following the instructions over here http://kevincuzner.com/2013/05/27/raspberry-pi-as-an-avr-programmer/ I have successfully interfaced with my Arduino using his modified avrdude file. However, I would like to integra...
by abishur
Mon Dec 15, 2014 4:16 am
Forum: Camera board
Topic: MMAL Motion - tuning & optimisations
Replies: 161
Views: 114292

Re: MMAL Motion - tuning & optimisations

Just read through this thread and I was wondering if there was ever a fix released to be able to rotate the video 180 degrees, I saw the suggestion of using -vflip, but that doesn't seem to affect my images :( Edit: Nevermind, I just realized that I needed a second dash for it to flip things correct...
by abishur
Sat Dec 13, 2014 8:54 pm
Forum: Troubleshooting
Topic: [SOLVED] Can't ping from non-Pi computer
Replies: 18
Views: 18971

Re: Can't ping from non-Pi computer

I think it just got solved! After installing it fresh I just did the apt-get update/upgrade and during the process I noticed it did an upgrade to wpa_conf. As soon as it was done, lo and behold I was able to ping the pi directly. Which makes sense, back when I previously used this wifi adapter with ...
by abishur
Sat Dec 13, 2014 8:46 pm
Forum: Troubleshooting
Topic: [SOLVED] Can't ping from non-Pi computer
Replies: 18
Views: 18971

Re: Can't ping from non-Pi computer

Additional network information my interfaces file GNU nano 2.2.6 File: /etc/network/interfaces auto lo iface lo inet loopback #iface eth0 inet dhcp allow-hotplug wlan0 iface wlan0 inet manual wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf iface default inet dhcp iface home inet dhcp my wpa_supplic...
by abishur
Sat Dec 13, 2014 8:40 pm
Forum: Troubleshooting
Topic: [SOLVED] Can't ping from non-Pi computer
Replies: 18
Views: 18971

Re: Can't ping from non-Pi computer

What are the other devices running (Windows, linux, OSX, somethng else)? What software firewalls are running on them? Have you configured your LAN network as "private & trusted" on Windows? Does your router/switch/hub/access point have any controls for ICMP packets? I've tried using window and linu...
by abishur
Sat Dec 13, 2014 8:27 pm
Forum: Troubleshooting
Topic: [SOLVED] Can't ping from non-Pi computer
Replies: 18
Views: 18971

Re: Can't ping from non-Pi computer

I did a fresh install of raspbian and I'm still having the same problem. The router can ping the model A, the Model B can ping the Model A, but no other device on the network can ping the model A! I've also removed the wireless adapter as a possible failure point, I've previously used this adapter o...
by abishur
Sat Dec 13, 2014 7:39 pm
Forum: Camera board
Topic: noir, model a and grainy video
Replies: 0
Views: 403

noir, model a and grainy video

I'm using the pi noir with a model a (no +) and getting some very grainy video while previewing the video on the pi. I'm not paying any special parameters when invoking raspivid do it should be hd quality video right? Is this a limitation since its noir or is there a way to tweak the settings and im...

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