Hello everyone, I had what seemed like a strange issue with gcc not being able to find the gtk libraries, but solved it. I thought I would share what I found. I had gtk.h installed at /usr/include/gtk-3.0/gtk/. I definitely had dev version. In my program i had: #include <gtk-3.0/gtk/gtk.h> In my bui...

I looked at the reviews on amazon and a lot of people complained about the fit of the case, quality of the ac adapter, and the wireless adapter. I was almost turned off by the "it doesn't fit" comments. Note I said if fit "perfectly" in my review. That means there is no slop, and you have to assemb...

Monkinator, I personally liked the CanaKit Ultimate Starter pack for the RPi B+. I even write a review here: http://www.spazztech.com/canakit-rpi-ultimate-kit-review.html I have not seen one for the RPi 2 in person. It makes sense to get an RPi 2 though. For OS, its probably best to start out with N...

I just wanted to post what I found was causing my problem. I was just about to give up, but decided to try one more time from scratch. To my surprise it worked on the first try with no errors. That has happened to me before, but in this case I can not figure out what was happening exactly. The error...

I found the issue. The bcm2835 library failed to map the register addresses for the peripherals. On lines 45 and 49 - 56 I am seeing "MAP_FAILED" instead of a register address. BTW, I downloaded and tried using SPI with wiringPi and the spiSpeed.c example worked out of the box. I'm tempted to just u...

All the libraries which access the gpios at a low-level needed to be updated for the Pi2. Make sure you are using the latest version. I am running the latest version of Rasbian just downloaded and installed today and the latest version of the bcm2835 library (1.44). My program is still exiting with...

Sorry if this is a repeat. A search did not uncover an answer for me. Has anyone used successfully used SPI with the bcm2835 library with the RPi 2 yet? My program is exiting from the bcm2835_spi_begin() function with code 139. I have not found anything in the bcm2835.c or bcm2835.h code that would ...

Hi, I'm working on a project and the raspberry pi will be interfacing with NPN and PNP transistors. Anyway, it's important for me to know how the GPIO pins in the Pi work. I understand that when they are set to HIGH 3.3V is connected to them. However, I'm confused as to what happens when they are s...

Here is another link with it for sale from Australia. It's well into Monday in Australia right now.

http://raspberry.piaustralia.com.au/pro ... -2-model-b

I was wondering the same thing myself a while back. Although I was trying to decide between C and Python. I have played with C, C++, Java, C#, Python, and Objective-C. I have to admit I like Java, but its hard to beat C for pure performance. Since performance could be an issue on the Pi as you point...

@DougieLawson thank you for the reply.. I reversed the logic of the python code and seems well but i think there is some problem with the relay still...even when the Raspberry Pi is turned off and the bulb connected relay is still plugged to the wall, the bulb seems to be on i.e. the relay is still...

I've just spent over an hour in a freezing shed trying to get a solderpro 120 butane soldering iron to light and get hot enough to solder a switch onto a bit of wire. I gave up after my wife accused me of making her into a shed widow and threatened to ground me. :shock: So, can anyone recommend a g...

I'd still use a separate controller for a balancing robot I've been thinking the same thing for my own projects. I like the idea of using the RPi for a user and communications interface for a robotics project, but using a something else for the real time work like reading sensors and controlling se...

I didn't look through the entire code, but it seems like you are using a polling method to detect when a button is pressed. This can be unreliable unless you have very little else happening in the same loop of the program. It appears to me like it could be that you just have too much else happening ...

A capacitor is an energy storage device that blocks instantaneous changes in potential between the two points it is attached to. More simply put, it slows down changes in voltage. This is useful to remove unwanted ripple (noise) in voltage at the point it is attached to. So if you think you need to ...